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Race Calendar

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May 2026

Date Event Distance Location Description
05/06/2026 Fog City Run 5K SanFrancisco, CA The Fog City Run is a hilly 5km (ish) route through the marina neighborhood and the Presidio.
05/09/2026 Byxbee Park Run 5K Palo Alto, CA Byxbee Parkrun is a free, fun and friendly weekly 5K community event. The run starts at 8am.
05/09/2026 Campus Life 5K 5K Fresno, CA This 5k + Kids Fun Run is for the whole family to enjoy!
05/09/2026 Girls on the Run 5K 5K San Leandro, CA Each season comes to an end with a celebratory 5K.
05/09/2026 Grizzly Peak Trail Run 50K, 26.2M, 30K, 13.1M, 10K Berkeley, CA The run starts at Lake Anza and travels through the beautiful and popular Tilden Park in the Berkeley Hills. T-shirts will be given to all pre-registered runners.
05/09/2026 Paiute Meadows Trail Run 50K, 30K, 13.1M, 4.5M, 1M Susanville, CA Join us at Susanville Ranch Park as we showcase the region's premiere trail system.
05/09/2026 Quicksilver 100K and 50K 100K, 50K San Jose, CA The Quicksilver 100k race is a Western States 100 Mile Endurance Run qualifier!
05/09/2026 Race For Open Space 35K, 25K, 12K, 1M Monterey, CA A fundraiser and awareness campaign to support Big Sur Land Trust and access to parks and open spaces.
05/09/2026 Race to Cure Sarcoma 5K San Francisco, CA The Race to Cure Sarcoma (RTCS) is the premier run/walk series in the United States, focused on raising awareness and research funds for sarcoma.
05/09/2026 She.is.beautiful 5K & 10K 10K, 5K Santa Cruz, CA We believe creating a stronger self mentally and physically manifests into a stronger self in all areas of your life. Let's move through this journey together.
05/09/2026 Sly Park Lake Trail Run 50K, 26.2M, 18M, 13.1M, 8.5M, 10K, 5K Pollack Pines, CA TBD. The run around Sly Park Lake is a challenging course but no big climbs or long downhills. The trail goes through endless pine trees and is one of the best kept secrets in the Sierra.
05/09/2026 Stinson Beach/Muir Woods Marathon 26.2M, 13.1M, 7M Stinson Beach, CA Mt. Tamalpais is a treasure trove of pristine trails. The course is on the best single track the mountain has to offer with some of the most beautiful mileage you will ever run.
05/09/2026 Waves & Whales 5K Trail Run 5K Point Arena, CA This event promises to be a worthwhile coastal excursion - runners can expect a rejuventating run in a natural beauty setting while supporting the stewardship of this land.
05/09/2026 Wicked Wine Run - Sacramento 5K, 1K Lodi, CA Come run with us at this historic family winery and experience the rich traditions, scenic vineyards and, of course, a well-earned glass of wine at the finish!
05/09/2026 Willow Glen 5K 5K San Jose, CA TBD. Join us for the Willow Glen 5K Run/Walk for Education.
05/09/2026 Yosemite Half Marathon 13.1M Bass Lake, CA The course includes rough terrain, fast downhill descent on a beautiful paved road and around Bass Lake.
05/13/2026 Fog City Run 5K San Francisco, CA The Fog City Run is a hilly 5km (ish) route through the marina neighborhood and the Presidio.
05/16/2026 13 Mile Trail Race Top Down 13.1M San Jose, CA TBD. The course is point to point. It will be marked with single solid PINK color ribbons tied to clothespins, ORANGE cones, signs and gypsum.
05/16/2026 Bishop High Sierra Ultras 100K, 50M, 55K, 20M, 6K Bishop, CA These are high altitude races, with lots of climbing, in the scenic foothills of the Eastern Sierra Nevada.
05/16/2026 Byxbee Park Run 5K Palo Alto, CA Byxbee Parkrun is a free, fun and friendly weekly 5K community event. The run starts at 8am. Please come along and join us whatever your pace!
05/16/2026 Cedar Grove Scamper 4M Chico, CA The course is a beautiful four mile loop through lower Bidwell Park. The course starts and ends at Cedar Grove picnic area. Surfaces are pavement and dirt trails.
05/16/2026 Girls on the Run - Silicon Valley 5K Los Gatos, CA Join us for our 5K Celebration at Vasona Park. Our event is about accomplishing a goal and is not timed!
05/16/2026 Leigh Longhorn Stampede 5K San Jose, CA Whether you are a walker, casual jogger, distance runner, or just want to cheer on the participants, come join our community celebration!
05/16/2026 Luc's Run 10K, 2M Tuolumne, CA The scenic race route starts in a community of cheering local residents and proceeds through peaceful pastures with a challenging uphill climb through the historic streets of Tuolumne city.
05/16/2026 Napa Wilderness Trail Runs 40M, 50K, 30K, 13.1M, 10K Napa, CA Napa Wilderness Trail Runs at Skyline Park will offer a wide range of trail runs from Ultra distance to a 10k for new trail runners or folks just getting back to the trails.
05/16/2026 Rim Rock 50M Trail Challenge 50M Napa Valley, CA This is a bold new endurance event that showcases the breathtaking beauty and rugged terrain of Napa's finest trail systems.
05/16/2026 Run for Amma 50K, 30K, 10K Los Gatos, CA The Run for Amma is an annual event to help raise awareness and money to aid in cutting edge research and treatments for cancer.
05/16/2026 Wild Rose Half Marathon & 5K 13.1M, 5K Roseville, CA The Wild Rose Half Marathon and 5K is blooming in Roseville this spring! Runners will enjoy smooth paved trails, fresh air and a new PR.
05/16/2026 Windsor Half Marathon 13.1M, 10K, 5K Windsor, CA Windsor Run and Wine is the most memorable race and post race festival in California!
05/16/2026 YOLO Run 10K, 5K, 2K Davis, CA You Only Live Once, so join us for the YOLO Run for a morning of sunshine that benefits children and families.
05/17/2026 Bay to Breakers 12K, 15K San Francisco, CA It’s a race made for everyone, so dress up, bring your friends and be cheered on every step of the way by SF’s finest crowds. Pushing boundaries and breaking records since 1912 – it’s your turn to join the party.
05/17/2026 Chocolate Chase 5K for Craniofacial Awareness 5K 5K, 1M Sacramento, CA Mark your calendars! Plan ahead, signup early and don't miss out on the most delicious race of the year! Finishers receive a See's Candy bar!
05/17/2026 Foster 5K 5K San Jose, CA Support Foster Youth in Silicon Valley! Go green and skip the swag to minimize your carbon footprint. Share the Foster 5K! #Foster5K.
05/17/2026 Mud Factor - Sacramento 5K Sacramento, CA The Mud Factor is a seriously fun 5K Obstacle Run! Giant Cargo Climbs, Water Slides, Epic Mud Crawls and Kidz Family Waves, too!
05/17/2026 The Grand Climb 5K Fresno, CA The Grand Climb awaits you! Are you up for the challenge? This events starts inside Chukchansi Park Stadium and finishes at the top of a 10-story building, The Grand Tower.
05/20/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
05/23/2026 Byxbee Park Run 5K Palo Alto, CA Byxbee Parkrun is a free, fun and friendly weekly 5K community event. The run starts at 8am. Please come along and join us whatever your pace!
05/23/2026 China Camp Trail Run 13.1M, 10K, 5K San Rafael, CA TBD. After enjoying views of Mt. Tam, San Pablo Bay and San Francisco the courses wind along thick forests and descend into open trails.
05/23/2026 Memorial Day Run - Sacramento 13.1M, 10K, 5K, 1M Sacramento, CA Honor, Remember and Run for Freedom! Join us for a special event that combines a run with the powerful spirit of remembrance for the brave men and women who have sacrificed for our freedom.
05/23/2026 Memorial Day Run - San Francisco 13.1M, 10K, 5K, 1M San Francisco, CA Honor, Remember and Run for Freedom! Join us for a special event that combines a run with the powerful spirit of remembrance for the brave men and women who have sacrificed for our freedom.
05/23/2026 Placerville Path Memorial Day Run 13.1M, 15K, 10K, 5K Placerville, CA TBD. This race on the El Dorado Trail in Placerville is held rain or shine. The path is surrounded with beautiful oak trees, rolling hills and incredible views.
05/23/2026 Western States Memorial Weekend Training Runs 70M Over the Memorial Day weekend Western States offers three training runs to acquaint runners with the last 70 miles of the Western States course.
05/24/2026 LMJS 4th Sunday Runs 15K, 10K, 5K Oakland, CA Distances offered at these races are 5K (once around the lake), 10K (twice around the lake) and 15K (three times around the lake).
05/27/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
05/30/2026 Big River Adventure 10K, 5K Mendocino, CA Join us for a unique race experience where you can choose your adventure to run, swim, walk, or paddle your way through the scenic beauty of Mendocino County's Big River.
05/30/2026 Byxbee parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
05/30/2026 Calero Trail Run 50K, 25K, 13.1M, 15K, 10K, 5K San Jose, CA TBD. Beginning at Calero County Park, this trail run has everything! Experience awesome single track, great hills, and dirt paths.
05/30/2026 Cinderella Trail Run 50K, 26.2M, 30K, 13.1M, 5M Oakland, CA The course travels through beautiful Redwood Regional Park.
05/30/2026 Monterey Spartan Super 10K 10K Salinas, CA There’s nothing mediocre about this middle distance race. The Spartan Super offers the ideal blend between distance and speed.
05/30/2026 San Jose Kids Run 1M San Jose, CA This run will be held on Saturday as part of the San Jose Half Marathon weekend.
05/30/2026 San Mateo PAL's 5K 5K San Mateo, CA This day is dedicated to supporting health and mental wellness, encouraging community partnerships and educating about diverse resources.
05/30/2026 Sonoma Coast Trail Run 50K, 26.2M, 30K, 13.1M Duncan Mills, CA Presented by SkyBreaker Racing, Sonoma Coast Trail Runs take place on the beautiful trails and fire roads of Sonoma Coast State Park on Northern California's beautiful coastline.
05/30/2026 Tail Wagger 5K 5K, 1M Tahoe Vista, CA The Tail Wagger 5K and 1 Mile course feature the trails at the North Tahoe Regional Park.
05/31/2026 Lighthouse 5K 5K Santa Margarita, CA Get ready to lace up your running shoes and join us for a fun-filled event that’s all about making a positive impact in our community!
05/31/2026 San Jose Half Marathon 13.1M, 8K San Jose, CA Enjoy a flat and fast half marathon course or an 8K, with both courses including the Mariachi Mile!
05/31/2026 Spartan Trail - Monterey 50K, 13.1M, 10K Salinas, CA This race is held within a classic Spartan OCR festival weekend.

June 2026

Date Event Distance Location Description
06/03/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
06/06/2026 Bakersfield Hot Fudge Sundae Run 5K Bakersfield, CA Run a 5k or Walk our 1 Mile Walk and earn your Hot Fudge Sundae! Want a little more fun? Join or create a Sundae Team!
06/06/2026 Baylands Nature Preserve parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
06/06/2026 DeCelle Memorial Lake Tahoe Relay 72M South Lake Tahoe, CA The Lake Tahoe Relay teams consist of 7 people, each running approximately 8 to 12 miles.
06/06/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/06/2026 Mt. Umunhum Ultras 100K, 50M, 50K, 26.2M, 30K, 13.1M, 9M, 10K, 5K San Jose, CA It is with great excitement that we present the trail running community with an exclusive trail racing event – the Mt. Umunhum Ultras!
06/06/2026 Shadow of the Giants 50K & 20K Run 50K, 20K Fish Camp, CA Join us for the annual Shadow of the Giants 20k & 50k, an unforgettable race through the scenic and historic trails of the Sierra National Forest.
06/06/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/07/2026 Hot Fudge Sundae Run 5K Fresno, CA Run or Walk our 5k or 2m courses and earn your Hot Fudge Sundae! Want a little more fun? Join or create a Sundae Team!
06/07/2026 Lake Chabot Trail Challenge 13.1M, 5K Castro Valley, CA We are so excited to celebrate the annual Lake Chabot Trail Challenge Half Marathon and 5K. This race is well regarded amongst serious trail runners in the outlying areas.
06/07/2026 Presidio Wall 5K 5K San Francisco, CA Start and finish on the grass lawn adjacent to Presidio Wall Playground.
06/07/2026 Statuto Race 8K San Francisco, CA The Statuto Race commemorates the creation of the first Italian Constitution (Statuto Albertino) and is a running tradition in San Francisco.
06/10/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
06/11/2026 Stars and Strides Run 10K, 5K San Jose, CA Fun, family-friendly activities.
06/12/2026 Tahoe 200 200M Lake Tahoe, CA The Tahoe 200 is an incredible journey around the largest alpine lake in North America.
06/13/2026 Bay Area 100 100M Berkeley, CA The Bay Area 100 is here! The Bay Area 100 isn’t just a race—it’s an epic odyssey through some of California’s most breathtaking terrain.
06/13/2026 Baylands Nature Preserve parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
06/13/2026 Cool Moon Trail Runs 100M, 100K, 50M, 25M Cool, CA The Heat 100-Mile Endurance Run of Northern California.
06/13/2026 Hunting Hollow 5K/10K 10K, 5K Gilroy, CA Our annual 5K/10K fun run and walk takes place each year on the second Saturday in June at the beautiful Hunting Hollow of Henry W. Coe State Park.
06/13/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/13/2026 Olympic Valley Half Marathon 13.1M, 8M Olympic Valley, CA This is great course featuring epic valley and peak views and the Truckee River corridor. Start and Finish in the Village At Palisades Tahoe.
06/13/2026 Redding Health Expo Run 5K Redding, CA Start line is on the west side of civic on road.
06/13/2026 Run to Foster Hope 5K, 3K Sacramento, CA Join us at FosterHope Sacramento's annual Run to FosterHope to support our community-based programs that help stabilize and support children and youth in crisis.
06/13/2026 SF Half Day 24H, 12H, 6H, 30M San Francisco, CA Run as far as you can or as little as you want. Sign up individually or as a team!
06/13/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/14/2026 City Beer Runs - Fort Point Valencia 5K, 10K San Francisco, CA Join us at Fort Point Beer Company's Valencia Street location! Our brewery runs start at a local brew house and work their way through city streets before ending back at the host watering hole for a post run social and raffle! Save $5 with coupon code SWEAT
06/14/2026 Cool Moon Trail Runs 13.5M, 11.5M Cool, CA The Heat 100-Mile Endurance Run of Northern California.
06/14/2026 Dipsea Race 7.4M Mill Valley, CA First run in 1905, the Dipsea is the oldest trail race in America. It is run every year on the second Sunday in June.
06/14/2026 Spreckles Lake 5K and Lightning Mile 5K, 1M San Francisco, CA Two races in one! Join us for either a fast, downhill 1 mile race or a scenic 5K loop, or both!
06/17/2026 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neighborhood and the Presidio.
06/20/2026 Bakersfield Father's Day Run 5K Bakersfield, CA Please join us for our annual FATHER'S Day Run to honor our Essential Dads! Run our 5k or 2k run/walk at The Park at River Walk.
06/20/2026 Baylands Nature Preserve parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
06/20/2026 Bizz Johnson's Southside Scramble 22K, 14K, 7K Susanville, CA This amazing new trail race showcases the best of the Susan River Canyon!
06/20/2026 Golden State Trail Run 50K, 35K, 13.1M, 10K Monterey, CA TBD. The Golden State 50K/35K/Half Marathon/10K is our premier summer event, traversing the fabulous trails of Fort Ord National Monument.
06/20/2026 Headwaters Trail Run 56K, 31K, 10K Mount Shasta, CA These three scenic trail runs are named after the headwaters of the Sacramento River.
06/20/2026 Huntington Lake Triathlon, 5k & 10k 10K, 5K Lakeshore, CA The Huntington Lake Triathlon is a fun and challenging race in an incredible location in Lakeshore, CA near the China Peak Resort.
06/20/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/20/2026 Miles for Mayo 5K 5K Brentwood, CA The Miles For Mayo 5K is a timed, family-friendly community event focused on commemorating the life of Matías “Mayo” Rogers and helping others find inspiration through running.
06/20/2026 Silicon Valley PRIDE 5K 5K San Jose, CA A 5K, where you can walk, jog, run or sashay your way to the finish line.
06/20/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/20/2026 Wild and Free Summer 5K 5K Paso Robles, CA Our annual healthy lifestyle, Summer 5K walk/run and breakfast benefiting 805 Street Outreach presented by Wild&Free Hair Studio in Paso Robles!
06/21/2026 Father's Day Rainbow Falls 5K 5K San Francisco, CA Start/Finish: JFK Dr. & Transverse Dr.
06/21/2026 Father's Day Run 10K, 2M Fresno, CA Please join us for our annual FATHER'S Day Run to honor your Dad! Lets celebrate ALL dads! Run our 10k or 2 mile run/walk.
06/24/2026 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
06/27/2026 Baylands Nature Preserve parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
06/27/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/27/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
06/27/2026 Western States Endurance Run 100M Squaw Valley, CA TBD. The Western States 100-Mile Endurance Run is the world’s oldest and most prestigious 100-mile trail race.
06/28/2026 Big Chief 50K 50K Truckee, CA The Big Chief 50K trail race features an epic course that combines single-track and fire-road trails set in the scenic forests between Lake Tahoe and Truckee.
06/28/2026 Burton Creek Trail Run 13.1M, 12K, 6K Tahoe City, CA The Burton Creek Trail Run takes place on a beautiful, fun and challenging trail system within Burton Creek State Park near Tahoe City, CA.
06/28/2026 Cal Tri La Crema 5K 5K Guerneville, CA Cal Tri La Crema starts at iconic Johnson's Beach and ends with a run through the La Crema Estate at Saralee’s Vineyard.
06/28/2026 Great Highway Lands End 10K 5K San Francisco, CA The DSE is a club that encourages runners and walkers of all levels to compete, socialize, have fun and improve ourselves.
06/28/2026 Mare Island Half Marathon 13.1M, 10K, 5K Vallejo, CA Our Half Marathon course will take you along the historic naval yard to the highest point of Mare Island for beautiful views of the Bay, Mt. Diablo, and Mt. Tamalpais.
06/28/2026 The Rock the Loch 13.1M, 10K, 5K Castro Valley, CA We DO promise a gorgeous trail run on the scenic trails of Loch Chabot Regional Park, some quality nature therapy, and some incredible views!

July 2026

Date Event Distance Location Description
07/01/2026 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
07/03/2026 Burney Basin Days 10K & 5K 10K, 5K Burney, CA TBD. The course is on a scenic forest road through breathtaking Burney Basin. Come for the run - stay for the fun.
07/04/2026 Alameda July 4th Parade R.A.C.E. 5K Alameda, CA Come out for our July 4th tradition and run this flat and fast point to point 5k thru the closed streets of Alameda.
07/04/2026 Baylands Nature Preserve Park Run 5K 5K Palo Alto, CA This event takes place every Saturday at the Preserve. It is a free and fun 5K community event. Come to walk, jog, run, voluteer or even spectate.
07/04/2026 Folsom Firecracker 10K, 5K, 2M Folsom, CA Join us for the Annual Folsom Firecracker. It is a great way to kick off Independence Day.
07/04/2026 Freedom Run 4M, 2M Fresno, CA Start off the holiday with a bang and beautiful 4M run on our flag lined course. Enjoy acres of trees, geese and beautiful wildlife! We are sure it will be an adventure!
07/04/2026 Great American Race 10K, 5K Visalia,CA Welcome to the annual Great American Race. Let's kick off the 4th of July with a run/walk and Costume Contest!
07/04/2026 July 4th Run - Sacramento 13.1M, 10K, 5K Sacramento, CA Run Free. Run Proud! Celebrate America's independence with the July 4th Freedom Run - where every stride honors liberty, courage and the spirit of freedom.
07/04/2026 July 4th Run - San Francisco 13.1M, 10K, 5K San Francisco, CA Run Free. Run Proud! Celebrate America's independence with the July 4th Freedom Run - where every stride honors liberty, courage and the spirit of freedom.
07/04/2026 Liberty Bell 5K 5K, 1M Brentwood, CA Bring the family, young and old, and run/walk with us. We can't wait to see you there!
07/04/2026 Mace Ranch Park 5K Run 5K Davis, CA Join us each Saturday at Mace Ranch Park for a 5k walk, run, jog or roll. All are welcome!
07/04/2026 Rancho Hills Trail Run 50K, 24M, 13.1M, 9M, 10K, 5K, 1M Morgan Hill, CA TBD. Set in Rancho Canada del Oro Open Space Preserve the course is 60% dirt roads and 40% single track.
07/04/2026 Run For Chocolate - Sacramento 13.1M, 10K, 5K Sacramento, CA Ready. Set. Chocolate! Join us for the Sweetest Run of the Year! Lace up your running shoes and bring your sweet tooth because this isn't your average race.
07/04/2026 Run For Chocolate - San Francisco 13.1M, 10K, 5K San Francisco, CA Ready. Set. Chocolate! Join us for the Sweetest Run of the Year! Lace up your running shoes and bring your sweet tooth because this isn't your average race.
07/04/2026 Run Like a Hero 4th of July 5K 5K Chico, CA Our theme this year is Run Like a Hero! Wear your favorite hero costume or best Independence Day attire! Drinks and snacks will be provided after the race.
07/04/2026 Run to the Beach 10K, 5K Lake Tahoe, CA Run, walk or stroll the July 4th 5K or 10K course. Starting at the North Tahoe Regional Park the courses offer scenic and fun trails.
07/04/2026 San Francisco Bay 2 Bankers 5K, 10K 10K, 5K San Francisco, CA We have yet another never-been-done-before mystery theme celebrating the classic vibes of San Francisco, starting at Ghirardelli Square.
07/04/2026 Stars and Stripes 5K 5K Concord, CA Help make this 4th of July running party even better by inviting your friends, family and neighbors.
07/04/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
07/04/2026 Sunset Dunes Park Run 5K 5K San Francisco, CA This is a free, fun and friendly weekly 5K community event. Walk, jog, run, volunteer or spectate -it is up to you.
07/08/2026 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
07/11/2026 Baylands Nature Preserve Park Run 5K 5K Palo Alto, CA This event takes place every Saturday at the Preserve. It is a free and fun 5k Community event. Come to walk, jog, run, voluteer or even spectate.
07/11/2026 FYMO's Giving to Live 5K Cancer Run 5K San Jose, CA This is an inspiring and energetic event to honor, support and celebrate those affected by cancer.
07/11/2026 Lookin for a Cure 5K Palo Alto, CA Lace up your sneakers and make your mark in the fight against ocular melanoma! This heart-pumping event kicks off bright and early.
07/11/2026 Mace Ranch Park 5K Run 5K Davis, CA Join us each Saturday at Mace Ranch Park for a 5k walk, run, jog or roll. All are welcome!
07/11/2026 San Lorenzo River Trail Run 50K, 26.2M, 30K, 13.1M, 10K Santa Cruz, CA Run through 300 foot tall, 1500 year-old Coastal Redwoods, lush stream canyons, open meadows, pine and oak forests, and high dry chaparral-covered ridges.
07/11/2026 Stars and Strides 5K & 10K 10K, 5K San Jose, CA Every step you take supports Silicon Valley's most vital health care facilities and programs. Together, we're running toward a healthier, stronger future.
07/11/2026 Summer Grand Prix 5K Bakersfield, CA The Summer Grand Prix is a thrilling four-race competition for runners of all levels.
07/11/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
07/11/2026 Sunset Dunes Park Run 5K 5K San Francisco, CA This is a free, fun and friendly weekly 5K community event. Walk, jog, run, volunteer or spectate -it is up to you.
07/14/2026 Sunset Through the Trees Fun Runs 4.3M, 2M Redding, CA Join us this summer for a series of fun runs at various Redding locations.
07/15/2026 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
07/18/2026 Bad Bass Half Marathon 13.1M, 10K, 5K Castro Valley, CA Whatever the Bad Bass is doing here, we hope you'll join us for fun at beautiful Lake Chabot Marina in Castro Valley.
07/18/2026 Baylands Nature Preserve Park Run 5K 5K Palo Alto, CA This event takes place every Saturday at the Preserve. It is a free and fun 5k Community event. Come to walk, jog, run, voluteer or even spectate.
07/18/2026 Christmas in July 5K 5K Fresno, CA Run with Santa Claus down shaded Christmas Tree Lane in JULY! YEP!! HoHoHo! No Joke! Join Santa in July and see what he has in store for you!
07/18/2026 Davis Moonlight Race 10M, 10K, 5K Davis, CA This is a fun and festive evening event with an energetic atmosphere and great running/walking routes.
07/18/2026 Mace Ranch Park 5K Run 5K Davis, CA Join us each Saturday at Mace Ranch Park for a 5K walk, run, jog or roll. All are welcome!
07/18/2026 Muir Woods Mountain Challenge 30K, 13.1M, 10K Stinson Beach, CA The Muir Woods Mountain Challenge (formerly Table Rock) is a true competition for event-experienced and novice mountain runners alike.
07/18/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
07/18/2026 Sunset Dunes Park Run 5K 5K San Francisco, CA This is a free, fun and friendly weekly 5K community event. Walk, jog, run, volunteer or spectate -it is up to you.
07/21/2026 Sunset Through the Trees Fun Runs - Anderson River Park 5M, 2.8M Redding, CA Join us this summer for a series of fun runs at various Redding locations. These runs will take place on Tuesday evenings starting at 7pm.
07/22/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
07/25/2026 Baylands Nature Preserve Park Run 5K 5K Palo Alto, CA This event takes place every Saturday at the Preserve. It is a free and fun 5k Community event. Come to walk, jog, run, voluteer or even spectate.
07/25/2026 Calero Hills Trail Fest 26.2M, 30K, 133.1M, 10M, 10K, 5K San Jose, CA TBD. This trail has everything! Experience awesome single track, great hills and dirt paths.
07/25/2026 Dirty Dozen and Half Dozen Endurance Run 12H, 6H, 3H Pinole, CA Join us at Point Pinole Regional Shoreline for a different kind of race! From 7:00 am to 7:00 pm, the running party won't stop with 12 hour, 6 hour and 3 hour races going on.
07/25/2026 Lost Sierra Endurance Race 100K, 50K, 25K Downieville, CA This is a thrilling endurance experience set against the stunning backdrop of the Sierra Buttes in Downieville.
07/25/2026 Mace Ranch Park 5K Run 5K Davis, CA Join us each Saturday at Mace Ranch Park for a 5k walk, run, jog or roll. All are welcome.
07/25/2026 Miguel Reyes Elite Fun 5K 5K Fresno, CA A FUN competitive race in memory of a great person, runner and friend, Miguel Reyes from Fresno. Join his family, friends and coworkers in the 5K.
07/25/2026 Napa to Sonoma Wine Country Rose 5K 5K Napa, CA Start your destination weekend off with a very special 5K on Saturday morning.
07/25/2026 Run For Coffee Lovers - Sacramento 13.1M, 10K, 5K Sacramento, CA This fun filled day features a choice of race distances, perfect for runners and walkers of all ages and paces.
07/25/2026 Run For Coffee Lovers - San Francisco 13.1M, 10K, 5K San Francisco, CA This fun filled day features a choice of race distances, perfect for runners and walkers of all ages and paces.
07/25/2026 Run For Donuts - Sacramento 13.1M, 10K, 5K Sacramento, CA Join the Donut Run! Get ready for a sweet race!
07/25/2026 Run For Donuts - San Francisco 13.1M, 10K, 5K San Francisco, CA Join the Donut Run! Get ready for a sweet race!
07/25/2026 San Francisco 5K 5K San Francisco, CA The 5K Waterfront Race features a flat, fast course that is perfect for racing with friends or walking with a stroller or family dog.
07/25/2026 San Francisco Ultramarathon 52.4M San Francisco, CA Running two marathons in San Francisco is a challege for the bold. Along the way you will take in breathtaking views of the Golden Gate Bridge, the San Francisco Bay anf Fisherman's Wharf .
07/25/2026 Summer Grand Prix 5K Bakersfield, CA The Summer Grand Prix is a thrilling four-race competition for runners of all levels.
07/25/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
07/25/2026 Sunset Dunes Park Run 5K 5K San Francisco, CA This is a free, fun and friendly weekly 5K community event. Walk, jog, run, volunteer or spectate -it is up to you.
07/25/2026 The Great Shasta Rail Trail 50K, 30K, 10K McCloud, CA This is a relatively flat course with very nice footing. All distances are out and back. Beautiful crisp mountain air surrounds incredible views.
07/26/2026 LMJS Fourth Sunday Race 15K, 10K, 5K Oakland, CA Come join us at Lake Merritt for one of the East Bay's favorite races.
07/26/2026 Napa to Sonoma Wine Country Half Marathon 13.1M Napa, CA This popular race features a fast and scenic course starting at the winery and finishing in historic Sonoma Plaza.
07/26/2026 San Francisco 5K 5K San Francisco, CA Take in views of the Bay, the Bay Bridge, Treasure Island, Coit Tower and much more! We invite runners of all levels to experience our fast, flat course.
07/26/2026 San Francisco Alexi Pappas 10K 10K San Francisco, CA Meet Olympian Alexi Pappas at the race and the Race Expo. With her help we want to create a truly unforgettable race experience with excitement, fun and glitter!
07/26/2026 San Francisco City Half Marathon 13.1M San Francisco, CA A local favorite that starts in Golden Gate Park! This course offers a scenic and lovely route through San Francisco's most diverse and iconic neighborhoods.
07/26/2026 San Francisco Marathon 26.2M San Francisco, CA A running tour of everything San Francisco - Fisherman's Wharf, Golden Gate Bridge and Park, Haight Street, The Mission and AT&T Park.
07/26/2026 San Fransico Bridge Half Marathon 13.1M San Francisco, CA Prepare for an unforgettable race packed with breathtaking sights - including a run across the iconic Golden Gate Bridge!
07/27/2026 Badwater 135 135M Lone Pine, CA Covering 135 miles non-stop from Death Valley to Mt. Whitney, CA, the STYR Labs Badwater® 135 is the most demanding and extreme running race offered anywhere on the planet.
07/28/2026 Sunset Through the Trees Fun Runs -LEMA Ranch 4M, 2.5M Redding, CA Join us this summer for a series of fun runs at various Redding locations. These runs will take place on Tuesday evenings starting at 7pm.
07/29/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.

August 2026

Date Event Distance Location Description
08/01/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/01/2026 Point Mariah Trail Marathon 26.2M Soda Springs, CA Point Mariah offers expansive views of the Granite Chief Wilderness, the Pacific Crest Trail.
08/01/2026 Rodeo Valley Trail Run 50K, 30K, 13.1M, 8K Sausalito, CA This trail race is comprised of steep pitches and lofty downhill sections as it undulates the beautiful Marin Headlands hills and coastline.
08/01/2026 Summer Breeze Half Marathon 13.1M, 10K, 5K San Leandro, CA Starting in the San Leandro Marina and running along the shoreline of the San Francisco Bay, you can expect great views and, with any luck, a gentle breeze to keep you cool.
08/01/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/01/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/01/2026 Susan B Anthony Women's 5K 5K Sacramento, CA Founded in 1976, the Susan B. Anthony (SBA) 5k offers something for both competitive and casual runners alike.
08/01/2026 Truckee Half Marathon 13.1M, 5K Truckee, CA This Truckee Running event showcases the diverse beauty of sierra landscapes and gives runners a taste of our wonderful mountain town.
08/02/2026 Ely Mountain Trail Race 14K, 8K Shaver Lake, CA Join us in the mountains above Shaver Lake for the first-ever Ely Mountain Trail Race, where crisp air, big climbs, and epic views are all on the menu.
08/02/2026 Golden Gate Double 8K 8K, 5K, 3K San Francisco, CA It offers unparalleled views of the Golden Gate Bridge for more than 80% of the course!
08/02/2026 Skyline 50K 50K, 13.1M Castro Valley, CA Skyline is known as a great race for first-timers.
08/04/2026 Sunset Through the Trees Fun Runs 4M, 2.4M Redding, CA Join us this summer for a series of fun runs.
08/05/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/08/2026 Bear Creek 13.1M, 10K, 5K Lafayette, CA If you are looking for a super-fast, flat, easy course to set a personal record, you are probably in the wrong place.
08/08/2026 Hell of a Half Marathon 13.1M Exeter, CA Yes the course is challenging, the weather is hot, but what else would you expect at The Hell of Half Marathon?
08/08/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/08/2026 Marlette Lake Tahoe 50K, 10M Lake Tahoe, CA The Marlette 50K is a truly adventurous romp through some of planet earths most scenic and challenging trails.
08/08/2026 Mt. Madonna Challenge 13.1M, 10K, 5K Gilroy, CA Join us for an exhilarating charity run that fuels dreams and empowers young athletes!
08/08/2026 Napa Lapa 12H, 6H, 3H Napa, CA The Napa Lapa Trail Adventure is Inside Trail’s first time-based run.
08/08/2026 Noyo Headlands Race 13.1M, 10K, 5K Napa, CA This year we'll have 5K and 10K runs, a 5K fun walk, a half-mile kids' race and the return of the half marathon!
08/08/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/08/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/08/2026 Troy's Thunder Mountain 50K 50K Kit Carson, CA This course is a scenic alpine adventure in the High Sierra of Northern California.
08/09/2026 Humboldt Bay Marathon 26.2M, 13.1M, 5K, 1M Eureka, CA The Humboldt Bay Area combines spectacular scenery with the perfect climate for year-round running.
08/09/2026 SAR Wild Run 13.1M, 10K, 5K Shaver Lake, CA Join the hundreds of people supporting Fresno County Search and Rescue with a race in the beautiful Sierra Nevada mountain range.
08/11/2026 Sunset Through the Trees Fun Runs 5.5M, 2M Redding, CA Join us this summer for a series of fun runs.
08/12/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/15/2026 Almaden Hills Trail Run 50K, 26.2M, 13.1M, 8M, 10K, 5K San Jose, CA TBD. Set in Almaden Quicksilver park. Run in the beautiful hills of Almaden Valley.
08/15/2026 Falcon 5K 5K Pleasant Hill, CA This race is a great way to celebrate the start of the season, build our community, connect with local runners, and show your support for our student-athletes.
08/15/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/15/2026 Redwood (Summer) Trail Run 50K, 26.2M, 30K, 13.1M, 5M Oakland, CA The course travels through beautiful Redwood Regional Park. Enjoy the spectacular views along the East Ridge and West Ridge trails and wind through tall redwoods.
08/15/2026 Sixto Maldonado Jr Memorial 5K 5K Firebaugh, CA Join us this fall for the Officer Sixto Maldonado, Jr. Memorial 5K Run & 2 Mile Walk, a special community event honoring the life and service of Officer Sixto Maldonado, Jr.
08/15/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/15/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/15/2026 Tamalpa Headlands 50K 50K Muir Beach, CA Tamalpa Headlands 50k is a demanding ultramarathon with approximately 6,500-feet of elevation gain.
08/16/2026 City Beer Runs - Laughing Monk 5K, 10K San Francisco, CA Join us at our newest brewery partner, Laughing Monk! All of our runs start at a local brew house and work their way through city streets before ending back at the host watering hole for a post run social and raffle! Save $5 with coupon code SWEAT.
08/18/2026 Sunset Through the Trees Fun Runs 4M, 2.5M Redding, CA Join us this summer for a series of fun runs.
08/19/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/22/2026 Fillmore-Japantown Find-Your-Way 10K, 5K San Francisco, CA Choose between a 5K and 10K challenge where you find up to 30 checkpoints.
08/22/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/22/2026 Race for the Arts 5K Sacramento, CA TBD. Come out for the Race and stay for the Free Arts Festival, featuring: 5K Run/Walk and Kids Fun Runs.
08/22/2026 Race2Unravel 10K, 5K Gilroy, CA Join us in Gilroy, California for the Race2Unravel — a powerful day of ACTION in the fight against childhood cancer.
08/22/2026 Santa Cruz Trail Run 30K, 13.1M, 10K Felton, CA Giant redwoods dominate the landscape in our Santa Cruz Trail Run.
08/22/2026 Santa Rosa Marathon - 10K/5K 10K, 5K Santa Rosa, CA Join thousands of runners across four race distances and experience the pastoral beauty of late summer in Sonoma County.
08/22/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/22/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/22/2026 Trail Run at Sly Park 50K, 26.2M, 17M, 13.1M, 8M, 10K, 5K Pollock Pines, CA This event is held at the Sly Park Recreation Area in Pollock Pines, and it’s held under special use permit with the El Dorado National Forest.
08/22/2026 Walt Stack DSE Double Dipsea 13.7M Stinson Beach, CA First held in 1970, the Walt Stack DSE Double Dipsea is a not just another tough trail run. It's a sadistically designed race, intended to test your patience and perseverance.
08/22/2026 We Run Oakland: For Our Children 5K Oakland, CA Join DO & A Sista's Touch for our annual charity, 5K, to raise Human Trafficking Awareness.
08/23/2026 Good Dog - Dirty Dog 5K/10K 10K, 5K Granite Bay, CA This event is for walkers, runners, and their dogs! We are excited to offer this event for athletes and their dogs and hope everyone has a fun time.
08/23/2026 LMJS Fourth Sunday Race 15K, 10K, 5K Oakland, CA Fourth Sunday run.
08/23/2026 Millerton Madness Triathlon & 5K 5K Friant, CA Runners go the extra distance for a 5k run and get the same great swag, post race meal, and share the madness.
08/23/2026 Santa Rosa Marathon 26.2M, 13.1M Santa Rosa, CA Treat yourself to scenic miles through dazzling vineyards and pastoral beauty along mostly flat courses in beautiful Sonoma County!
08/25/2026 Sunset Through the Trees Fun Runs 4.3M, 2M Redding, CA Join us this summer for a series of fun runs.
08/26/2026 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/29/2026 Angel Island Half Marathon 13.1M, 10K Tiburon, CA You'll fall in love with San Francisco all over again as you follow this hilly loop trail circumnavigating Angel Island.
08/29/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/29/2026 Moonlight Madness 2M Shasta Lake, CA 2-Mile run/walk across Shasta Dam via the moonlight.
08/29/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/29/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
08/30/2026 Crystal Springs Run 50K, 26.2M, 35K, 13.1M, 8K Woodside, CA Experience the towering redwoods, lush ferns and beautiful trails through Hubbart Park, King's Mountain and Bear Gulch.

September 2026

Date Event Distance Location Description
09/02/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
09/05/2026 China Peak Running Festival 100K, 50K, 25K, 10K Lakeshore, CA Join us in the Western Sierra Range for an ultra mountain trail run. This is a big time race course that will satisfy runners of every level.
09/05/2026 Fiesta 10K 10K, 1M Fresno, CA Come and celebrate Mexican Independence Day at this unique event! Challenge yourself and do a DOUBLE RUN!! Yes, do the MILE followed by the 10K.
09/05/2026 Mace Ranch Park Run 5K Davis, CA This 5K run is a free, fun and friendly weekly community event. We all take part for our own enjoyment. Please come along and join whatever your pace.
09/05/2026 Night Nation Run 5K San Jose, CA This is the world's first Running Music Festival! Experience a music filled course with live DJs, bubble zones, light shows, neon and black lights.
09/05/2026 Run to Remember 5K, 1M Clovis, CA This event was established in honor and remembrance of the 2,977 people lost in the horrific 9/11 terrorist attack.
09/05/2026 Stevens Creek Striders Saturday Run 13M, 5M Cupertino, CA We meet every Saturday at 8:30am at the Reservoir Parking Lot for a run, often followed by brunch.
09/05/2026 Sunnyvale Bay Trail Park Run 5K San Francisco, CA We blow the whistle at 8am for this weekly free, fun and friendly 5K community event. Run, jog or walk at your own pace.
09/05/2026 Sunset Dunes Park Run 5K San Francisco, CA Enjoy gorgeous scenery at this free, fun and friendly weekly 5K community event. Open for beginners and seasoned runners as well as walkers.
09/05/2026 Taco The Town 5K and 10K 10K, 5K Stockton, CA Do you like tacos? We do too! We’ve wondered why all races don’t have tacos at the finish line… so we created a run just to put them there!
09/06/2026 Annadel Loop 6.8M Annadel State Park, CA The Annadel Loop is a 6.75 mile run sponsored by the Empire Running Club. This is a challenging loop in the hills of Annadel State Park.
09/06/2026 Diablo Trail Run 50K, 26.2M, 13.1M, 10M, 4M Clayton, CA Mount Diablo provides spectacular views of San Francisco Bay Area and surrounding valleys. The longer events are mountainous and very scenic.
09/06/2026 Fiesta Half Marathon 13.1M, 10K Bakersfield, CA Come and celebrate HISPANIC HERITAGE MONTH at this unique event! Family, friendly, fun event!
09/07/2026 Davis Labor Day Run 10K, 5K Davis, CA Get ready to celebrate Labor Day in style! This vibrant event takes place in the heart of Davis and offers an opportunity for all to join in on the fun with races for all ages.
09/09/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
09/12/2026 Berkeley Trail Adventure 50K, 35K, 13.1M, 10K Berkeley, CA Our Berkeley Adventure Run brings runners and walkers into two East Bay gems. Fabulous for all runners and even for those embarking on their first trail running event.
09/12/2026 Emerald Bay Trail Run 12K Lake Tahoe, CA Join us for "one of America's most scenic trail runs"
09/12/2026 Graniterock River Run 5K, 1M Hollister, CA This unique run meanders through a sand and gravel quarry. You will see the working quarry along the banks of the San Benito River amid beautiful natural surroundings.
09/12/2026 Kern Cancer Run 5K Bakersfield, CA Gather your friends, family and coworkers and join us for the the Kern Cancer Run/Walk and Festival at Riverwalk!
09/12/2026 LSA's Run Home 10K, 5K Los Gatos, CA Life Services Alternatives provide exceptional community living and programs for adults with developmental disabilities.
09/12/2026 Mace Ranch Park Run 5K Davis, CA This 5K run is a free, fun and friendly weekly community event. We all take part for our own enjoyment. Please come along and join whatever your pace.
09/12/2026 Mendocino Running Festival 12H, 6H, 13.1M, 10K Mendocino, CA A full weekend of fun awaits runners of all distances, along with plenty of activities for the entire family.
09/12/2026 Nash Ranch Mud Run 5K Redding, CA This is a fun event for the whole family with lots of MUD! There will be obstacles you've come to know and love - maybe some new ones, too!
09/12/2026 National Chocolate Day: Run for Chocolates - Sacramento 13.1M, 10K, 5K, 1M Sacramento, CA Get ready to indulge in a sweet celebration! This event is tailor-made for chocolate lovers of all ages and fitness levels.
09/12/2026 National Chocolate Day: Run for Chocolates - San Francisco 13.1M, 10K, 5K, 1M San Francisco, CA Get ready to indulge in a sweet celebration! This event is tailor-made for chocolate lovers of all ages and fitness levels.
09/12/2026 Pincushion Hill Climb 1M Friant, Ca 1 Mile! Straight Up! This will be a chip timed hill climb starting at the San Joaquin River Trailhead and finishing at the top of Pincushion Mountain.
09/12/2026 Run for Mental Health - Sacramento 13.1M, 10K, 5K Sacramento, CA Every step you take shatters the stigma around mental illness. We're not just running; we're running with purpose and heart, showing solidarity for those on their own mental health journey.
09/12/2026 Run for Mental Health - San Francisco 13.1M, 10K, 5K San Francisco, CA Every step you take shatters the stigma around mental illness. We're not just running; we're running with purpose and heart, showing solidarity for those on their own mental health journey.
09/12/2026 Running Fence Run - A Celebration of Freedom and Democracy 10K Cotati, CA This is more than just a race, it's a celebration of the enduring spirit of democracy, artistic expression, physical achievement and unity and rememberance.
09/12/2026 South Hills Single Track Trail Run - Fall 50K, 26.2M, 16M, 13.1M, 9M, 10K, 5K, 1M San Jose, CA TBD. Our mission is to provide the most scenic, challenging and fun runs in California. Come run the Miner's Ghost Town and we promise you won't be disappointed!
09/12/2026 Stevens Creek Striders Reservoir Run 13.1M, 11K, 2.5M Cupertino, CA TBD. This run is a wonderful introduction to trail running, yet it promises to be challenging enough for the most experienced trail and ultra trail runners.
09/12/2026 Sunnyvale Bay Trail Park Run 5K San Francisco, CA We blow the whistle at 8am for this weekly free, fun and friendly 5K community event. Run, jog or walk at your own pace.
09/12/2026 Sunset Dunes Park Run 5K San Francisco, CA Enjoy gorgeous scenery at this free, fun and friendly weekly 5K community even. Open for beginners and seasoned runners as well as walkers.
09/13/2026 Asha-Jyothi 5K 5K Fremont, CA Our organization is dedicated to serve the educational and healthcare needs of underprivileged children. This event is more than a run, it's all -singing and all-dancing at the end.
09/13/2026 Buffalo Stampede 10M, 4M Sacramento, CA The Buffalo Stampede 10-Mile Run/Walk, the race that kicked off Sacramento’s road-racing tradition, is over forty years old!
09/13/2026 Delta Harvest Run 13.1M, 10K, 5K, 1M Brentwood, CA Join us for this cherished community tradition that brings neighbors together to make a difference. The flat and fast courses are designed for all skill levels.
09/13/2026 Honey Badger Half Marathon 13.1M, 10K, 5K Santa Venetia, CA The Badger's race takes place in China Lake State Park in Santa Venetia. Sign up now to receive your AWESOME race "woodallion" AND Lifestyle tee.
09/13/2026 Race to Slow the Pace 5K Lodi, CA The run will foster a connection to the land and the importance of slowing the pace of development to protect valuable farmland.
09/13/2026 Shaver Lake Triathlon, 5K & 10K 10K, 5K Shaver Lake, CA Participants can look forward to a race event that showcases their endurance and skills, with various race distances accomodating all levels.
09/16/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5km(ish) route through the Marina neighborhood and the Presidio.
09/18/2026 Last One Standing 4.18 Bradley, CA Participants will run a 4.18 mile loop every hour until only one person is standing. Runners will continue until ONE runner completes a FINAL lap.
09/18/2026 Mile Madness Ultra Endurance Run 72H, 48H, 72H Auburn, CA This is more than a race - it's a vibrant celebration of endurance , community and personal triumph!
09/19/2026 Aloha Run 5K, 2M Clovis, CA Join us for a morning full of tropical vibes, fitness and fun! Don your best Hawaiian shirts, leis or grass skirts and head to scenic Old Town Clovis for a run/walk you won't forget.
09/19/2026 Anime Fan and Fitness Festival 10K, 5K Gilroy, CA If you are a seasoned runner, a casual jogger, a dedicated fitness enthusiast, a creative cos player or a passionate anime fan this event was made just for you.
09/19/2026 Gold Rush Growler Trail Run 10M, 5K Granite Bay, CA This run starts at Granite Beach on Folsom Lake. The Gold Rush Growler features scenic single track courses along the shoreline.
09/19/2026 Kiwanis River Run 5K, 2M Fresno, CA This is a chance to make a difference as proceeds support the Valley Children's Hospital Pediatric Trauma-Injury Prevention Program.
09/19/2026 Mace Ranch Park Run 5K Davis, CA This 5K run is a free, fun and friendly weekly community event. We all take part for our own enjoyment. Please come along and join whatever your pace.
09/19/2026 Mile Madness Ultra Endurance Run 100M, 24H, 12H, 6H Auburn, CA This is more than a race - it's a vibrant celebration of endurance , community and personal triumph!
09/19/2026 Newark Mile 4K Newark, CA The Newark Mile 4K is held each year in conjunction with Newark Days to celebrate the incorporation of the city.
09/19/2026 Rocky Ridge Trail Half Marathon 13.1M, 10K, 5K San Ramon, CA This is the race your momma warned you about! The half marathon cannot be described as "flat and fast" or "good for beginners" or with any other nice phrase.
09/19/2026 Stevens Creek Striders Saturday Run 5M to 13M Cupertino, CA We meet every Saturday at 8:30 am at the Reservoir Parking Lot for a run, often followed by brunch.
09/19/2026 Sunnyvale Bay Trail Park Run 5K San Francisco, CA We blow the whistle at 8am for this weekly free, fun and friendly 5K community event. Run, jog or walk at your own pace.
09/19/2026 Sunset Dunes Park Run 5K San Francisco, CA Enjoy gorgeous scenery at this free, fun and friendly weekly 5K community event. Open for beginners and seasoned runners as well as walkers.
09/19/2026 Tierra Redonda Mountain Trail Run 48H, 24H, 21K, 10K Bradley, CA Let’s run! Trail Running on a private cattle ranch.
09/20/2026 Hot Pink Fun Run 10K, 5K, 1M Roseville, CA Join us in the "Fight Against Breast Cancer"! Gather your friends and family and enjoy a fun race, followed by pancakes, bubbles and brews…
09/20/2026 Island Running Festival 13.1M, 10K, 5K, 1M Alameda, CA We bring a distance for every runner in a single day of racing.
09/20/2026 Jog in the Fog 5K San Francisco, CA We hope you will join us for another great event filled with family, fitness and fog!
09/20/2026 One Mile 4 One Child Charity Run 10K, 5K, 1M San Jose, CA Experience the thrill of San Jose Valley Charity Running event.
09/23/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
09/25/2026 Mammoth Trail Fest 50K, 26K Mammoth Lakes, CA Donuts, dirt, and epic trail running across the top of California.
09/26/2026 A Walk/Run to Remember 5K Carson City, NV Join the fight to end Alzheimer's. All participants and teams are invited to show your PURPLE!
09/26/2026 Belmont Water Dog Run 10K, 5K, 1M Belmont, CA This run has grown into an anticipated annual community event. Every year students from our local high school volunteer to help organize this event.
09/26/2026 Big Sur Trail Marathon 26.2M, 13.1M, 5M Big Sur, CA Along the route you'll see some of the most amazing views that the California coastline has to offer.
09/26/2026 Blazin' Eagles 5K 5K, 1M Modesto, CA Join us for a fun-filled run/walk in support of Scouting America!
09/26/2026 CASA Superhero Run 5K Lodi, CA Save the date! Every kid needs a hero but kids in foster care need SUPERHEROES! Run your own race at your own pace.
09/26/2026 Dick Collins Firetrails 100K, 50M, 26.2M Castro Valley, CA These races are run on the famous trails of the East Bay in the San Francisco Bay Area. Join us for some beautiful courses.
09/26/2026 Great Trail Race 21K, 18K Tahoe City, CA The Great Trail Race is an epic point to point route between Truckee and Tahoe City, CA that you can either Ride or Run.
09/26/2026 HERS Breast Cancer Foundation Run/Walk 10K, 5K Fremont, CA Join us at Quarry Lakes Reginal Park as we run/walk to support Bay Area breast cancer survivors.
09/26/2026 JP's Backyard Ultra and Hike 10H, 3.3M Napa, CA This is a one of a kind ultramarathon and hike set in the scenic hills of Skyline Wilderness.
09/26/2026 Mace Ranch Park Run 5K Davis, CA This 5K run is a free, fun and friendly weekly community event. We all take part for our own enjoyment. Please come along and join whatever your pace.
09/26/2026 Oktoberfest Run - Sacramento 13.1M, 10K, 5K Sacramento, CA Lace up, get festive and earn your Oktoberfest Celebration the best possible way - by running for it! This run has a dash of Bavarian spirit and is brimming with Gemutlichkeit (friendliness) and fun.
09/26/2026 Oktoberfest Run - San Francisco 13.1M, 10K, 5K San Francisco, CA Lace up, get festive and earn your Oktoberfest Celebration the best possible way - by running for it! This run has a dash of Bavarian spirit and is brimming with Gemutlichkeit (friendliness) and fun.
09/26/2026 Ridge Rambler Half Marathon 13.1M Bridgeport, CA This is a POINT TO POINT COURSE!! The start line is not near the finish line but we will offer a shuttle from the finish back to the start.
09/26/2026 Run for Donuts - Sacramento 13.1M, 10K, 5K Sacramento, CA Get ready to sprinkle some fun on your run! This is no average jog; it's a scrumptous sprint where the sweet reward of donuts awaits at the finish line!
09/26/2026 Run for Donuts - San Francisco 13.1M, 10K, 5K San Francisco, CA Get ready to sprinkle some fun on your run! This is no average jog; it's a scrumptous sprint where the sweet reward of donuts awaits at the finish line!
09/26/2026 Stevens Creek Striders Saturday Run 5M to 13M Cupertino, CA We meet every Saturday at 8:30 am at the Reservoir Parking Lot for a run, often followed by brunch.
09/26/2026 Sunnyvale Bay Trail Park Run 5K San Francisco, CA We blow the whistle at 8am for this weekly free, fun and friendly 5K community event. Run, jog or walk at your own pace.
09/26/2026 Sunset Dunes Park Run 5K San Francisco, CA Enjoy gorgeous scenery at this free, fun and friendly weekly 5K community event. Open for beginners and seasoned runners as well as walkers.
09/26/2026 Superhero Run 5K Lodi, CA Calling all superheroes!!! The Child Abuse Prevention Council and Court Appointed Special Advocates (CASA) are thrilled to invite you to participate in our Annual Superhero 5K Fun Run.
09/26/2026 Urban Cow Half Marathon 5K Sacramento, CA Join the herd at the Urban Cow weekend, Sacramento's top running event. Start your weekend with a scenic 5K run/walk through beautiful William Land Park.
09/26/2026 Waffle Run 10K, 5K Bakersfield, CA Come out and join our community. Enjoy some bite sized waffles after the run. Dogs not recommended on the course. Strollers welcome.
09/27/2026 Auburn Half Marathon 13.1M, 12K, 5K Auburn, CA Out of the city, onto the trails…Auburn is known as the Endurance Capital of the World! Get it done in Gold Country!
09/27/2026 Barra of Mendocino Harvest Celebration Run 5K 5K Redwood Valley, CA Like Running or Walking? Love Wine? This race is for you!
09/27/2026 LMJS Fourth Sunday Race 15K, 10K, 5K Oakland, CA The distances offered at this race are one, two and three times around Lake Merritt.
09/27/2026 Spartan Trail - San Jose Trail Challenge 50K, 13.1M, 10K Saratoga, CA Spartan has done a big jump into the trail running scene through Spartan Trail, creating and partnering with world class events for an outstanding experience.
09/27/2026 Urban Cow Half Marathon 13.1M Sacramento, CA Follow Saturday's run with the Half marathon on Sunday. The half showcases Sacramento's most iconic neighborhoods and landmarks, including Capital Mall, Old Sacramento, and more!
09/27/2026 ZERO Prostate Cancer Run/Walk - Sacramento 5K, 1M Sacramento, CA Let's #ZERO out Prostate Cancer Together! Register and start fundraising today to support prostate cancer patients and families!
09/30/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.

October 2026

Date Event Distance Location Description
10/03/2026 Frida Fun Run 5K, 2K Fresno, CA This race is also part of The Central Valley Runner of the Year Series.
10/03/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/03/2026 Nor Cal Think Pink 5K 5K Redding, CA Help us RUN into October with one of our most popular events!
10/03/2026 Rock 'n' Roll San Jose 5K 5K San Jose, CA Welcome to Speed City, USA! Nicknamed after the legendary San Jose State track teams of the 60s, San Jose is all about speed.
10/03/2026 Star City San Bruno Mountain Half Marathon 13.1M, 5K Brisbane, CA Our race was dreamed up by runners who love the trails of San Bruno Mountain.
10/03/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/03/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/03/2026 Think Pink 5K 5K Yuba City, CA We still want to honor our survivors and celebrate those who have battled breast cancer along with other female forms of cancer.
10/04/2026 Cancer Champions Run/Walk 10K, 5K, 1M West Sacramento, CA Please join us for the annual Cancer Champions Run/Walk! Choose between 1 Mile, 5K, 10K, or Virtual Participation options.
10/04/2026 Cindy's Race 10K/6K 10K, 6K, 1K Santa Rosa, CA 1 in 8 women will be diagnosed with breast cancer in their lifetime. Cindy is a mother, a wife, a friend who received this diagnosis. So, we race.
10/04/2026 Judgment Day Half Marathon 13.1M, 10K, 5K, 1M Bakersfield, CA This is a very scenic course.
10/04/2026 Lions Turtle Bay Run 13.1M, 10K, 2M Redding, CA We have runners from various parts of the country come to compete in the sport of running.
10/04/2026 Napa Half Marathon 13.1M, 6.5M Napa, CA The Napa Half Marathon is nestled up in the rolling hills of east Napa.
10/04/2026 Peace Officer Memorial Run 13.1M, 5K Modesto, CA This race was developed to honor the police officers from Stanislaus County who were killed in the line of duty.
10/04/2026 Rock 'n' Roll San Jose Half & 10K 13.1M, 10K San Jose, CA Welcome to Speed City, USA! Nicknamed after the legendary San Jose State track teams of the 60s, San Jose is all about speed.
10/04/2026 Run by the Sea 13.1M, 12K, 4K Santa Cruz, CA This unique Half Marathon meanders along the gorgeous coastal bluffs of California's Central Coast in Santa Cruz and consists mostly of flat, packed dirt trails.
10/07/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
10/10/2026 Granite Head Trails & Ales 11.2M, 6.6M Granite Bay, CA Granite Head is definitely the cure for what ales you!
10/10/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/10/2026 Mt. Umunhum Trail Conquest 50K, 26.2M, 13.1M, 5K San Jose, CA TBD. This race starts at the Hacienda Entrance of Almaden Quicksilver Park.
10/10/2026 Riverbank Run for the Cheese 10K, 5K Riverbank, CA The 5K walk/run and 10K run travel through shady, quiet residential neighborhoods near the Galaxy Theatres in Riverbank.
10/10/2026 Run for Austin's Lungs 5M Petaluma, CA Run for Austin’s Lungs is a family-friendly 5K walk/run held in honor of baby Austin, who is bravely battling chronic lung disease.
10/10/2026 Ruth Anderson Memorial Endurance Run 100K, 50M, 50K San Francisco, CA Race HQ (bib#s, Start) : Lake Merced Blvd. & Sunset Blvd., San Francisco, CA.
10/10/2026 Scarecrow 2.0 10K, 2M Exeter, CA What better way to welcome the cooler weather than with a fun run through beautiful Exeter? The course winds through our charming downtown—right alongside the scarecrows!
10/10/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/10/2026 Sunset & Cider Trail Races 50K, 13.1M, 5M Auburn, CA Join us in Auburn, CA, for the next edition of the Sunset & Cider Trail Races, set against the dramatic backdrop of the American River Canyon.
10/10/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/10/2026 Wicked Wine Run 5K American Canyon, CA Join the Wicked Wine Run for a fun-filled day of running or walking through the scenic vines, followed by wine, music, and friends!
10/11/2026 Bizz Johnson 50K, 26.2M, 13.1M, 10K Susanville, CA The Bizz Johnson Trail Marathon and 50K distances begin at Mason Station with an out and back on McCoy Road.
10/11/2026 Champion Mine Trail Race 13.1M, 5K Nevada City, CA Runners will enjoy breathtaking views along the Tribute Trail and Deer Creek, combined with a beautiful variety of landscapes throughout the race.
10/11/2026 Clo Cow Half Marathon 13.1M, 10K, 5K Petaluma, CA The running of the Clo Cow Half Marathon, 10K & 5K is set to return to Historic Downtown Petaluma.
10/11/2026 Humboldt Redwoods Marathon 26.2M, 13.1M, 5K Weott, CA This race is in Humboldt Redwoods State Park and the Half Marathon follows the second half of the iconic Avenue of the Giants Marathon course.
10/11/2026 Oktoberfest Pumpkin Run 5K Fresno, CA Run or walk along our scarecrow and pumpkin decorated course and earn your pumpkin and start a new family tradition!
10/11/2026 Run for Education 10K, 5K San Ramon, CA Come for the Run, Stay for the Fun.
10/11/2026 Run for Vision 5K 5K San Francisco, CA TBD. Join us at the Run for Vision 5K in October for a great race.
10/14/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
10/16/2026 Lake Tahoe Marathon Weekend 72M, 52.4M, 26.2M, 13.1M South Lake Tahoe, CA October 16-18, 2026.
10/16/2026 Lake Tahoe Marathon: Nevada Half 13.1M South Lake Tahoe, CA The Nevada Half Marathon is a boutique down hill half marathon starting at the top of Spooner Summit, ending on the bike path on Lakeshore Drive.
10/17/2026 Cal-Neva Marathon 26.2M Lake Tahoe, CA The Cal-Neva Marathon is a boutique marathon limited 100 to a la carte runners. It is run as part of the Tahoe Triple.
10/17/2026 California Gold Rush Trail Run 13.1M, 15K, 10K, 5K Coloma, CA All of the courses are a mix of very appealing singletrack dirt trails and a few paved areas.
10/17/2026 Diablo Summit Stomp 30K, 13.1M, 10K, 5K Coloma, CA Courses are all on dirt trails, heading out from Castle Rock park in Walnut Creek, heading into Mount Diablo State Park -- all the way to the summit for the 30K.
10/17/2026 Donut Fun Run 5K Alameda, CA The Donut Fun Run will be a timed, donut-themed 5k race held at Alameda Point's Seaplane Lagoon Promenade.
10/17/2026 Head for the Cure 5K - San Francisco 5K San Francisco, CA Join us for our annual Head for the Cure 5K - San Francisco as we raise funds, awareness, and hope for the San Francisco brain tumor community!
10/17/2026 Heart of Cool 13.1M, 10K, 5K Cool, CA The Heart of Cool Trail Run traverses some of the best trails Cool, CA and the Sierra Foothills have to offer.
10/17/2026 Jackalope Lope 52K, 20.5M, 8.5M Redding, CA All proceeds go back into maintaining our amazing trail system!
10/17/2026 John Wayne Grit Series - Lone Pine 13.1M, 10K Lone Pine, CA The run benefits John Wayne Cancer Foundation.
10/17/2026 Lake Tahoe Marathon: Incline Half 13.1M Lake Tahoe, CA This boutique half marathon course starts from Carnelian Bay and ends at Meadow Drive & H89.
10/17/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/17/2026 Oktoberfest Fun Run 10K, 5K Campbell, CA Kick off your Oktoberfest celebrations at Campbell’s Annual Oktoberfest Fun Run 10K, 5K & Kids' Dash.
10/17/2026 Reentry Resource Center's Rise Up and Run 5K 5K San Jose, CA The County of Santa Clara Reentry Resource Center and its partners are hosting a 5K run/walk to raise money to support the immediate needs of justice-involved people.
10/17/2026 Screamer Run 5K Bakersfield, CA Whether you are a competitive runner or just down for a scary good time, you don't want to miss out on this one-of-a-kind experience.
10/17/2026 Sonoma Fall Classic 100M, 50M, 26.2M Lake Sonoma, CA Come experience one of the most relentless and beautiful ultras on the West Coast featuring miles upon miles of singletrack with majestic views of Lake Sonoma.
10/17/2026 Springville Apple Run 10K, 5K Springville, CA This is a long standing community event as part of the Springville Apple Festival.
10/17/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/17/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/17/2026 Wicked Wine Run - Paso Robles 5K Paso Robles, CA At Wicked Wine Run, we invite you to run, walk, skip, or dance through some of the most scenic venues and vineyards across the country.
10/17/2026 Willow Hills XC 5K Folsom, CA This 5k race is run in two loops of rolling hills around a water reservoir right next to Folsom High School.
10/18/2026 Break Free Run 10K, 5K Folsom, CA Stand up against human trafficking this October by registering for the Break Free Run!
10/18/2026 City Beer Runs - Standard Deviant Brewing 5K, 10K San Francisco, CA City Beer Runs combines fully supported 5K and 10K runs with some of the best beer around to create one big run loving social event! Each run starts at a local brew house and works its way through city streets before ending back at the host watering hole for a post run social! Save $5 with coupon code SWEAT.
10/18/2026 Cloverdale Vineyard Races 26.2M, 13.1M, 10K, 5K Cloverdale, CA Join us for our annual event, with all races in the vineyards near the historic Asti Winery!
10/18/2026 Fleet Feet Fall Classic 13.1M, 4M Chico, CA Fleet Feet Chico is pleased to offer two trail races in our beautiful Upper Bidwell Park.
10/18/2026 Fresno Donut Run 5K Fresno, CA A fun Donut Themed 5k Run & Walk at Woodward Park!
10/18/2026 Great Pumpkin Run 13.1M, 10K, 5K Half Moon Bay, CA TBD. The world-famous Half Moon Bay Art & Pumpkin Festival is the season’s signature event, drawing hordes of visitors to the “World Pumpkin Capital” for an epic festival.
10/18/2026 Lafayette Reservoir Run 10K, 5K, 2M Lafayette, CA The Run is the city’s most popular “family affair”.
10/18/2026 Lake Evans 5K/10K 10K, 5K Bakersfield, CA 5K & 10K Run/Walk.
10/18/2026 Lake Tahoe Marathon 26.2M South Lake Tahoe, CA TBD. Sunday's Marathon is the original Lake Tahoe Marathon, and is the 3rd marathon of the Triple Marathon.
10/18/2026 San Mateo Rotary Fun Run 10K, 5K San Mateo, CA Thank you for supporting the Fun Run.
10/18/2026 Vampire Run - Unite for Bleeding Disorders 5K, 1M Roseville, CA Vampire Run 5K – join us at our first ever 5K on the trails of Roseville, CA!
10/21/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
10/24/2026 Big Sur River Run 10K, 5K Big Sur, CA TBD. A beautiful loop course along the Big Sur River and the towering redwood trees of Pfeiffer Big Sur State Park.
10/24/2026 Dia de los Muertos Half 13.1M, 5K Bakersfield, CA Join Us for a Vibrant Celebration of Life and Remembrance!
10/24/2026 Eden Rift Wine Run 5K 5K Hollister, CA Like Running or Walking? Love Wine? This race is for you!
10/24/2026 Haunted Corner 5K, 10K Pleasant Hill 10K, 5K Pleasant Hill, CA Trick or treating for adults (and families) in teams of 1 to 5! Adventure through the wickedly decorated neighborhoods of Pleasant Hill's Poet's Corner neighborhood.
10/24/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/24/2026 Miles for Migraine - San Francisco 5K San Francisco, CA This event is a fundraiser for Migraine & Headache Awareness, Treatment & Research.
10/24/2026 Monster Mash Dash 5K Fresno, CA This Halloween-themed annual race is a not to miss event and we guarantee you will experience a spooktacular fun time! Wear a Costume and be in our Costume Contest!
10/24/2026 Napa Wine Country Marathon 26.2M, 13.1M, 10K Calistoga, CA Babbling streams will be your soundtrack as you challenge yourself on the lush singletrack within Bothe-Napa Valley State Park.
10/24/2026 Night Nation Run - Sacramento 5K Sacramento, CA The Night Nation Run is the World’s first Running Music Festival the ultimate blend of a Music Festival and a Fun Run.
10/24/2026 Oakland Hills Trail Run 35K, 13.1M, 10K Oakland, CA A hidden redwood forest lies in the hills just a few miles over the ridge from downtown Oakland.
10/24/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/24/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/24/2026 Trail Run at Sly Park 50K, 26.2M, 18M, 13.1M, 8.5M, 10K, 5K Pollock Pines, CA This event is held at the Sly Park Recreation Area in Pollock Pines, and it’s held under special use permit with the El Dorado National Forest.
10/25/2026 Bakersfield Monster Mash Dash 5K Bakersfield, CA This Halloween-themed annual race is an event that you won't want to miss and we guarantee you will experience a spooktacular fun time!
10/25/2026 Day of The Dead 5K 5K Fair Oaks, CA Our race begins in the center of Old Fair Oaks Village before descending over the bridge along the scenic American River Trail.
10/25/2026 Dia de los Miles 5K Elk Grove, CA Celebrate Hispanic heritage by joining us for the annual Dia de los Miles 5K and kids’ fun runs.
10/25/2026 Dia De Los Muertos 5K 5K Clovis, CA Join us at this special celebration for "Dia de los Muertos"! Participants are encouraged to dress in their Dia de los Muertos make up and costumes!
10/25/2026 LMJS Fourth Sunday Race - October 15K, 10K, 5K Oakland, CA The distances offered at these races are a 5K (once around the Lake), a 10K (two times around), and 15K (three times around).
10/25/2026 Santa Cruz Marathon 26.2M, 13.1M, 5K Santa Cruz, CA The inaugural Santa Cruz Marathon will be a run on the edge in every sense.
10/25/2026 Walk & Roll Fun Run 5K, 1K Modesto, CA The Friends of CHHS warmly invite walkers, runners, and rollers to participate in the Walk & Roll Fun Run!
10/25/2026 Winters Spooktacular Fun Run 10K, 5K, 1M Winters, CA Grab your costume and running shoes and head out to the Winters Runners and Walkers Club Spooktacular Fun Run and Costume Contest.
10/28/2026 Fog City Run 5K San Francisco, CA The course is a hilly 5km (ish) through the Marina neighborhood and the Presidio.
10/30/2026 USS Hornet Twilight 5K 5K Alameda, CA We have partnered with the USS Hornet to bring back a super fun and unique race experience to Alameda.
10/31/2026 Almaden Hills Run 50K, 26.2M, 21M, 13.1M, 8M, 10K, 5K San Jose, CA TBD. This event is set in Almaden Quicksilver Park, in the beautiful hills of Almaden Valley. In a nutshell: It's challenging and very fun. Volunteers get a free future race.
10/31/2026 Big Steps for Little Friends 5K 5K San Francisco, CA NLF’s Big Steps for Little Friends 5K Run/Walk will be at Golden Gate Park.
10/31/2026 Dia De Los Muertos 5K Race 5K Sacramento, CA Come celebrate Dia De Los Muertos with a 5K. The race will be held at North Natomas Regional Park. It is a flat course held on the sidewalk which is a loop around the entire park.
10/31/2026 Haunted Flats 5K, 10K Sacramento 10K, 5K Sacramento, CA Trick or treating for adults (and families) in teams of 1 to 5! Adventure through the wickedly decorated neighborhoods of East Sacramento.
10/31/2026 Mace Ranch parkrun 5K Davis, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/31/2026 Stevens Creek Striders Saturday Run 13M, 5M Cupertino, CA TBD. We meet every Saturday at the Reservoir Parking Lot for a run, often followed by brunch.
10/31/2026 Sunnyvale Bay Trail parkrun 5K Sunnyvale, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/31/2026 Sunset Dunes parkrun 5K San Francisco, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/31/2026 Zombie Runner Halloween 26.2M, 13.1M, 10K, 5K San Jose, CA Run in your Halloween costume along popular Coyote Creek and win a prize. The course is relatively flat, easy to follow and will be marked with directional signage the entire way.

Did we miss any races? Please email us the race details (including web site URL) and you'll be entered in a monthly contest to win cool prizes. Race details should be sent to calendar@sweattracker.com