Race Calendar

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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		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!

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		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.

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		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.

December 2026

Date	Event	Distance	Location	Description
12/13/2026		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.

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