Race Calendar
We send out a monthly email with information and discounts on races in your area. Register now to get this good stuff in your inbox!
Please check out our Featured Races as well.
December 2025
| Date | Event | Distance | Location | Description |
|---|---|---|---|---|
| 12/13/2025 | 12Ks of Christmas | 12K, 2M | Redding, CA | Both races will start at 9am from Lake Redding Park. |
| 12/13/2025 | Byxbee parkrun | 5K | Palo Alto, CA | It is a 5km run - it's you against the clock. Every Saturday at 8:00am. |
| 12/13/2025 | Folsom Lake Trail Half Marathon | 13.1M | El Dorado Hills, CA | Come join us for a 95% single track 5% dirt road trail race alongside the beautiful Folsom Lake. |
| 12/13/2025 | Hark The Herald 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. |
| 12/13/2025 | Holiday Hustle 5K, 10K Sacramento | 10K, 5K | Sacramento, CA | Adventure through the wonderfully decorated old neighborhoods of Sacramento's Mid-40s. |
| 12/13/2025 | Holiday Hustle 5K, 10K Walnut Creek | 10K, 5K | Walnut Creek, CA | Adventure through the wonderfully decorated neighborhoods of Walnut Creek. |
| 12/13/2025 | Holiday Run and Walk for Health | 3M, 1M | Antioch, CA | We are very excited to bring back the Kiwanis Holiday run. |
| 12/13/2025 | Jingle Bell Run for Toys for Tots | 5K | Fresno, CA | Each year the event welcomes 3,000+ participants and is fast becoming a family annual tradition and raising toys and cash for the Toys for Tots campaign. |
| 12/13/2025 | Modesto Spirit of Giving 5K | 5K | Modesto, CA | Be part of something big. |
| 12/13/2025 | Palo Alto Double | 15K, 10K, 5K | Palo Alto, CA | Bring the whole family and enjoy our pre Christmas events. Everybody gets a Santa Hat and all finishers get a medal. |
| 12/13/2025 | Summit Rock Half Marathon | 13.1M, 10K, 5K | Saratoga, CA | Come join us in the beautiful redwood groves of the Santa Cruz Mountains! |
| 12/14/2025 |
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10K , 5K | 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. |
| 12/14/2025 | Hanukkah 8 Krazy Kilometers | 8K, 2K | Bakersfield, CA | Runners, joggers and walkers of all ages are invited to the annual Hanukkah 8 Krazy Kilometers. |
| 12/14/2025 | Jingle Bell 5K | 5K | Sausalito, CA | Jingle Bell 5K and Brunch. |
| 12/14/2025 | Santa Hustle - Roseville | 13.1M, 5K | Roseville, CA | It’s the most wonderful time of the year! So, find that Christmas spirit and join us. |
| 12/14/2025 | Santa Run Silicon Valley | 5K | San Jose, CA | The Santa Run Silicon Valley offers a variety of family fun events from a 5K run/walk to a Kids Reindeer dash. |
| 12/17/2025 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) through the Marina neighborhood and the Presidio. |
| 12/20/2025 | Bakersfield Jingle Bell Run for Toys for Tots | 5K | Bakersfield, CA | The Jingle Bell Run will feature a Christmas designed Sweatshirts and Jingle Bells to all registered participants. |
| 12/20/2025 | Byxbee parkrun | 5K | Palo Alto, CA | It is a 5km run - it's you against the clock. Every Saturday at 8:00am. |
| 12/20/2025 | Clovis Rudolph Run | 5K | Clovis, CA | Continue the newest family tradition! Bring friends and enjoy a fun morning of music and Reindeer Games! |
| 12/20/2025 | Placerville's Holiday Jingle and Mingle Run | 13.1M, 15K, 10K, 5K | Placerville, CA | This event is run on the El Dorado Trail in beautiful historic Placerville. The path is surrounded with beautiful oak trees, rolling hills, and incredible views. |
| 12/21/2025 | Rainbow Falls 5K | 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. |
| 12/24/2025 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 12/27/2025 | Brazen New Year's Eve | Castro Valley, CA | 13.1M, 10K, 5K | Whether you are looking to squeeze in your first trail run or you're looking to log that 1,000th mile before the year ends, this is your chance! |
| 12/27/2025 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 12/28/2025 | LMJS Fourth Sunday Race | 15K, 10K, 5K | Oakland, CA | Come join us at Lake Merritt for one of the East Bay's favorite races! |
| 12/28/2025 | Windmill 10K | 10K | San Francisco, CA | The DSE is a club that encourages runners and walkers of all levels to compete, socialize, have fun and improve ourselves. |
| 12/31/2025 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) route through the Marina Neighborhood and the Presidio. |
| 12/31/2025 | New Year's One Day | 100M, 24H, 12H, 6H | San Jose, CA | Start the New Year running as far as you can or as little as you want. Sign up individually or as a team! |
January 2026
| Date | Event | Distance | Location | Description |
|---|---|---|---|---|
| 01/01/2026 | Auburn Resolution Run | 10M, 10K, 5K | Auburn, CA | This is the perfect way to kickstart your New Year's resolutions with a dash of adventure and a breath of fresh air. |
| 01/01/2026 | Brazen New Year's Day Runs | 13.1M, 10K, 5K | Castro Valley, CA | The sun is rising on New Year's Day? Where should you be? Hitting the trails of Lake Chabot, of course! |
| 01/01/2026 | Free New Year's Day 5K by Chico Running Club | 5K | Chico, CA | Start the new year off right! Join us for a Chico Running Club tradition - our New Year's 5K! This is a free event, bibs will not be assigned. |
| 01/01/2026 | New Year's One Day | 24H, 100M, 12H, 6H | San Jose, CA | Start the new year running as far as you can or as little as you want! Sign up individually or as a team! The course is a 6 mile loop. |
| 01/01/2026 | Resolve2Run | 10K, 5K | Grass Valley, CA | Race begins at 10:00 am at Chicago Park School. |
| 01/03/2026 | Byxbee Parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 01/03/2026 | Dia De Los Reyes Magos - Bakersfield | 13.1M, 5K | Bakersfield, CA | There is a special day in Mexico that is known as 'El Dia de Reyes' or Three King's Day. Join us for a morning of family fun as we celebrate this special day by running our fast and flat course. |
| 01/03/2026 | Frosty Fun Run | 4.3M, 2M | Redding, CA | This event takes place at Lake Redding Park. Join us for this race series and earn points for the Frosty Championship |
| 01/03/2026 | Hacienda Hills Run (Winter) | 50K, 26.2M, 30K, 13.1M, 9M, 10K, 5K, 1M | San Jose, CA | Located just outside of San Jose at the Almaden Quicksilver County Park, we are having a spectacular day of Northern California trail running. |
| 01/03/2026 | Kiwanis Resolution Run 5K/10K | 10K, 5K | Mountain View, CA | The Resolution Run is ON!! Let's start the new year with a fun race for all! Enjoy a great race in the park and the camaraderie of other runners and some post race music and refreshments. |
| 01/03/2026 | Lost Coast 55K | 55K | Whitehorn, CA | Run wild, run free! Want to start the new year with a killer adventure? Look no further than the Lost Coast. Rough, remote, yet incredibly runnable backcountry awaits in Humbodlt County. |
| 01/03/2026 | New Year New Me Run - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | Kick off the new year with energy, excitement and a community of runners ready to chase their goals. Whether you are a seasoned racer or just starting out, this run is for YOU! |
| 01/03/2026 | New Year New Me Run - San Francisco | 13.1M, 10K, 5K | San Francisco, CA | Kick off the new year with energy, excitement and a community of runners ready to chase their goals. Whether you are a seasoned racer or just starting out, this run is for YOU. |
| 01/03/2026 | New Year's Duathlon & 5K | 5K | Granite Bay, CA | The New Year's 5K Run/Walk is on a beautiful and fun course with nature trails and lake views. Not to be missed! |
| 01/03/2026 | Stevens Creek Striders Saturday Run | 2M to 13M | Cupertino, CA | We meet every Saturday, rain or shine, at the Reservoir Parking Lot for a run, often followed by brunch. Varying distances and paces, accomodating all levels of runners. |
| 01/03/2026 | Sunrise Marathon - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | Rise. Run. Shine. Start your day with purpose, peace and a little pavement. This breathtaking early morning race is designed to energize your soul and awaken your senses. |
| 01/03/2026 | Sunrise Marathon - San Francisco | 13.1M, 10K, 5K | San Francisco, CA | Rise. Run. Shine. Start your day with purpose, peace and a little pavement. This breathtaking early morning race is designed to energize your soul and awaken your senses. |
| 01/04/2026 | Dia De Los Reyes Magos - Fresno | 13.1M, 3K | Fresno, CA | There is a special day in Mexico that is known as 'El Dia de Reyes' or Three King's Day. Join us for a morning of family fun as we celebrate this special day by running our fast and flat course. |
| 01/07/2026 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) route through the Marina Neighborhood and the Presidio. |
| 01/10/2026 | Byxbee Parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 01/10/2026 | Frosty Fun Run | 4M, 2M | Redding, CA | This event takes place at LEMA Ranch. Join us for this race series and earn points for the Frosty Championship. |
| 01/10/2026 | Hope in Every Step 5K | 5K | Modesto, CA | This event is set against the beautiful trails of East La Loma Park. Participants will run or walk the course filled with encouragement, camaraderie and a spirit of togetherness. |
| 01/10/2026 | No Hands Trail Run | 50K, 35K, 13.1M, 8K | Auburn, CA | Participants will run along the historic Western States Trail to "No Hands Bridge", the dreaded K2 training hill and then the punishing Overlook Hill to the finish line. |
| 01/10/2026 | Stevens Creek Striders Saturday Run | 2M to 13M | Cupertino, CA | We meet every Saturday, rain or shine, at the Reservoir Parking Lot for a run, often followed by brunch. Varying distances and paces, accomodating all levels of runners. |
| 01/11/2026 | Hot Chocolate 15K/5K | 15K, 5K | San Francisco, CA | A chocolate lover's oasis waits at the post-race party! Celebrate your accomplishment with a finisher mug that includes fondue, dippables and our very own hot chocolate! |
| 01/14/2026 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) route through the Marina Neighborhood and the Presidio. |
| 01/17/2026 | Byxbee Parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 01/17/2026 | MLK Freedom Run - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | This event is not about just about fitness; it's a celebration of community, a call to action for social change and a reminder of the work to still be done. Let's run with purpose and passion. |
| 01/17/2026 | MLK Freedom Run - San Francisco | 113.1M, 10K, 5K | San Francisco, CA | This event is not about just about fitness; it's a celebration of community, a call to action for social change and a reminder of the work to still be done. Let's run with purpose and passion. |
| 01/17/2026 | Run For Donuts - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | Running for donuts is worth the pain! Get ready for a sweet race! Gather your friends and lace up for a run on a beautiful course and be greeted at the finish line with…donuts. |
| 01/17/2026 | Run For Donuts - San Francisco | 13.1M, 10K, 5K | San Francisco, CA | Running for donuts is worth the pain! Get ready for a sweet race! Gather your friends and lace up for a run on a beautiful course and be greeted at the finish line with…donuts. |
| 01/17/2026 | Stevens Creek Striders Saturday Run | 2M to 13M | Cupertino, CA | We meet every Saturday, rain or shine, at the Reservoir Parking Lot for a run, often followed by brunch. Varying distances and paces, accomodating all levels of runners. |
| 01/18/2026 | Crystal Springs (Winter) Trail Run | 50K, 26.2M, 35K, 13.1M, 8K | Woodside, CA | Experience the towering redwoods, lush ferns, and beautiful trails through Huddart Park, King's Mountain and Bear Gulch. |
| 01/18/2026 | Redding Marathon | 26.2M, 5K | Redding, CA | Enjoy a scenic journey down stream along the Sacramento River on paved running trails. Watch for bald eagles, osprey and other wildlife! |
| 01/21/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 01/24/2026 | Byxbee Parkrun | 5k | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 01/24/2026 | Folsom Lake Sweetwater Trail Run | 50K, 26.2M, 30K, 13.1M, 9M, 10K, 5K | El Dorado Hills, CA | This race is run on 95% single-track and 5% dirt road. The course primarily follows the South Side Trail. |
| 01/24/2026 | Frosty Fun Run | 5M, 2.8M | Redding, CA | This event takes place at Anderson River Park. Join us for this race series and earn points for the Frosty Championship. |
| 01/24/2026 | Gumby 10K & 5K | 10K, 5K | Granite Bay, CA | This race features a beautiful trail course along the shores of Folsom Lake. |
| 01/24/2026 | Stevens Creek Striders Saturday Run | 2M to 13M | Cupertino, CA | We meet every Saturday, rain or shine, at the Reservoir Parking Lot for a run, often followed by brunch. Varying distances and paces, accomodating all levels of runners. |
| 01/25/2026 | LMJS Fourth Sunday Race | 15K, 10K, 5K | Oakland, CA | All those interested in running, whether beginner, walker, jogger or competitive racer are welcome to join our monthly runs. |
| 01/28/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 01/31/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 01/31/2026 | Coyote Hills Half Marathon | 13.1M, 10K, 5K | Fremont, CA | Howl if you love bay views! Race Forecast: 100% Chance of Awesome! You will find an abundance of scenic views and a variety of surfaces. |
| 01/31/2026 | Frosty Fun Run | 4M, 2.4M | Redding, CA | This event takes place at Clover Creek Preserve. Join us for this race series and earn points for the Frosty Championship. |
| 01/31/2026 | Race to the Flagpole | 10K, 5K, 1M | Livermore, CA | This event is open to all ages and abilities. We host this event to encourage awareness and appreciation for fitness, as well as to foster community pride. |
| 01/31/2026 | Rotary Mission Ten | 13.1M, 10M, 5K | San Juan Bautista, CA | This event has been held for over 40 years. The rural course takes runners through farmland and up the Anzar hills. |
| 01/31/2026 | Stevens Creek Striders Saturday Run | 2M to 13M | Cupertino, CA | We meet every Saturday, rain or shine, at the Reservoir Parking Lot for a run, often followed by brunch. Varying distances and paces, accomodating all levels of runners. |
February 2026
| Date | Event | Distance | Location | Description |
|---|---|---|---|---|
| 02/01/2026 | San Francisco Half Marathon | 13.1M, 10K, 5K | San Francisco, CA | A runners’ favorite for its scenery and value. Fast and certified course through San Francisco’s scenic Golden Gate Park. |
| 02/04/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 02/07/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 02/07/2026 | Death Valley Marathon | 26.2M, 13.1M, 10K | Death Valley, CA | You'll admire the beauty of the surrounding desert as you follow this paved run from the Oasis Ranch through the heart of Death Valley National Park. |
| 02/07/2026 | Escape from Folsom 10 Miler and 5K | 10M, 5K | Granite Bay, CA | The Escape from Folsom 5K and 10 Miler both have new courses on scenic trails along the shoreline of Folsom Lake. |
| 02/07/2026 | Fort Ord Trail Run | 50K, 25K, 10K | Monterey, CA | The Fort Ord Trail Run has a capacity of 600 runners. |
| 02/07/2026 | Frosty Fun Run | 5.5M, 2M | Redding, CA | Race day registration only. |
| 02/07/2026 | Golden Gate (Winter) | 50K, 26.2M, 30K, 13.1M, 8K | Sausalito, CA | Enjoy vistas of the Pacific Coast and of the spectacular Marin Headlands with views of Tiburon, San Francisco and the Golden Gate Bridge. |
| 02/07/2026 | Mt. Umunhum Trail Conquest | 50K, 26.2M, 30K, 13.1M, 7M, 5K | San Jose, CA | This race starts at the Hacienda Entrance of Almaden Quicksilver Park. |
| 02/08/2026 | Super Bowl Sprint | 5K | Visalia, CA | Get those running shoes ready! It's time to lace up for a great cause with Creative Center Foundation's Annual Super Bowl Sprint. |
| 02/11/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 02/14/2026 | Bay Breeze | 13.1M, 10K, 5K | San Leandro, CA | Known for its romantic vistas of San Francisco and the Bay, our Bay Breeze race sets the stage for romance, whether you are in love with running or not. |
| 02/14/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 02/14/2026 | Fresno Valentine Run | 5K, 2M | Fresno, CA | A family tradition since 2002! |
| 02/14/2026 | Frosty Fun Run | 4M, 2.5M | Redding, CA | Join us for this 8 race series. Races are on Saturday mornings at a different location each week. |
| 02/18/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 02/21/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 02/21/2026 | Corporal Javier Bejar Memorial Run Reedley Police Department | 6M | Reedley, CA | This memorial run is more than a race—it’s a tribute to courage, service, and community. |
| 02/21/2026 | FOURmidable | 50K, 35K, 13.1M, 13K | Auburn, CA | FOURmidable trail races, an exhilarating adventure that promises to test your limits and immerse you in the breathtaking beauty of the Sierra Nevada foothills. |
| 02/21/2026 | Frosty Fun Run | 4M, 2.4M | Redding, CA | Join us for this 8 race series. Races are on Saturday mornings at a different location each week. |
| 02/21/2026 | Lost Trail Half | 13.1M, 5K | Granite Bay, CA | The Lost Trail 5K and Half Marathon have very well-marked courses that offer scenic lake views with lots of beautiful wildflowers in between well-stocked aid stations. |
| 02/21/2026 | Montara Mountain Trail Run | 50K, 26.2M, 20M, 13.1M, 10K | Pacifica, CA | Montara Mountain features the only undisturbed Coastal Mountain Habitat found over 100 miles of coastline. |
| 02/21/2026 | Redtail Ridge | 50K, 30K, 13.1M, 10K, 5K | Castro Valley, CA | This is one of our typically faster races with less elevation and some paved sections. |
| 02/22/2026 | FCancer Race | 10K, 5K | Middletown, CA | Everyone knows someone touched by Cancer, so you know what?? F*** CANCER! I know its harsh, but sometimes you have to just feel your feelings. Come run or walk it out. |
| 02/22/2026 | LMJS Fourth Sunday Race | 15K, 10K, 5K | Oakland, CA | All those interested in running, whether beginner, walker, jogger or competitive racer are welcome to join our monthly runs. |
| 02/25/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 02/28/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 02/28/2026 | Frosty Fun Run | 4.3M, 2M | Redding, CA | Join us for this 8 race series. Races are on Saturday mornings at a different location each week. |
| 02/28/2026 | Have a Heart for Kids 5K | 5K | Yuba City, CA | The Have a Heart for Kids 5K Run/Walk is a fundraiser for the Yuba City Education Foundation. |
| 02/28/2026 | Salmon Falls 50K | 50K | Coloma, CA | The Salmon Falls 50K is a point to point ultra distance trail race. |
| 02/28/2026 | Sanborn Trail Challenge | 13.1M. 8M, 4M | Saratoga, CA | TBD. The course is 95% single track trail, extremely mountainous, very technical, lushly wooded with a mixed evergreen forest. |
| 02/28/2026 | Support Blue Run | 10K, 5K | Fresno, CA | Join us at this year's Support Blue Run to show your support for our men and women in law enforcement who protect our Valley. |
| 02/28/2026 | Victory Race | 13.1M, 10K, 5K | Richmond, CA | Starting at the historic Craneway Pavilion, all distances will run out along the San Francisco Bay Trail with breathtaking views of the San Francisco Bay. |
March 2026
| Date | Event | Distance | Location | Description |
|---|---|---|---|---|
| 03/01/2026 | Livermore Valley Half Marathon | 13.1M, 5K | Livermore, CA | Join the Livermore Valley Half Marathon in California’s oldest wine region featuring a ‘Best of the Bay’ award. The 13.1 mile run is followed by the famed wine, beer & music festival. |
| 03/01/2026 | Napa Valley Marathon | 26.2M, 13.1M, 5K | Calistoga, CA | Following the famed Silverado Trail from Calistoga to Napa, our point to point marathon passes beautiful scenery & some of the most world-renowned wineries along the way. |
| 03/01/2026 | Zoom Angel Island | 15M, 10M, 5M | Tiburon, CA | Enjoy spectacular views of Marin County, San Francisco and the Golden Gate as you run this hilly, grass and forest covered island. |
| 03/04/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 03/07/2026 | 5K & Polar Plunge - Sacramento | 5K, 1M | Granite Bay, CA | This event is an iconic tradition in which brave supporters of Special Olympics raise funds by taking a quick dip in chilly waters. |
| 03/07/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 03/07/2026 | Chanoko Trail Runs | 50K, 31K, 5M | Granite Bay, CA | Participants have a choice of three distances. |
| 03/07/2026 | Race to the Top of Mt. Umunhum Vert Trail Challenge | 13.1M | San Jose, CA | TBD. This course is Point to Point. We will provide transportation back to the start line. Courses will be marked with ribbons, cones, signs and gypsum. |
| 03/07/2026 | Run for Mental Health - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | Mental health is just as important as physical health and every step you take can help make a difference. |
| 03/07/2026 | Run for Mental Health - San Francisco | 13.1M, 10K, 5K | San Francisco, CA | Mental health is just as important as physical health and every step you take can help make a difference. |
| 03/07/2026 | Super Heroes Run - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | This exciting event celebrates the super hero in everyone! |
| 03/07/2026 | Super Heroes Run - San Francisco | 13.1M, 10K, 5K | San Francisco, CA | This exciting event celebrates the super hero in everyone! |
| 03/07/2026 | Way Too Cool Endurance Run | 50K, 10M | Cool, CA | This race has become the most sought after 50K in the United States for veterans and novices alike. |
| 03/08/2026 | Artesa Wine Run 5K | 5K | Napa, CA | Whether you are looking to run, walk or just enjoy the wine and camaraderie this race is a sure thing for a great time and incredible experience. |
| 03/08/2026 | Foggy Bottom Milk Run | 10M, 4M, 2M | Ferndale, CA | The Foggy Bottom Milk Run is a wonderful family event, with team trophies in the 2 mile school team divisions, and age group awards in the 4 mile and 10 mile events. |
| 03/08/2026 | Tesoro Viejo Spring Classic | 13.1M, 10K, 5K | Madera, CA | This will take you away from busy city streets to tranquil paths through some of the most beautiful SPRING scenery which rivals any run in the State. |
| 03/11/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 03/14/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 03/14/2026 | Folsom Lake South Side Trail Runs | 50K, 26.2M, 30K, 13.1M, 10M, 7.5M, 10K, 5K, 1M | Folsom, CA | TBD. Great running with oak trees, lush green grass, nice scenery, views of Folsom Lake, the surrounding foot hills and the snowcapped Sierra Mountains. |
| 03/14/2026 | Marin Ultra Challenge | 50M, 50K | Sausalito, CA | The Marin Ultra Challenge, our premier Marin County long distance trail race, delivers ample hills and sweeping descents. |
| 03/14/2026 | Rocky Hill | 10K, 5K | Exeter, CA | We are the best kept secret in the Central Valley in the foothills of the Sierra Nevada mountain range. |
| 03/14/2026 | Shamrock'n | 10K, 5K | Sacramento, CA | Celebrate St. Patrick’s Day with a Shamrock-themed Half Marathon, 10K, 5K and Fun Run! |
| 03/14/2026 | Sloth Run - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | Get ready to embrace a refreshing twist on racing! This unique event is all about taking it slow and enjoying the journey, where the motto is "Slow is the new fast!". |
| 03/14/2026 | Sloth Run - San Francisco | 13.1M, 10K, 5K | San Francisco, CA | Get ready to embrace a refreshing twist on racing! This unique event is all about taking it slow and enjoying the journey, where the motto is "Slow is the new fast!". |
| 03/14/2026 | St. Paddy's Day Lucky Run - Sacramento | 13.1M, 10K, 5K | Sacramento, CA | Get ready to lace up your shoes and celebrate the spirit of St. Patrick's Day. Join a lively community of fellow revelers as you don your favorite green gear. |
| 03/14/2026 | St. Paddy's Day Lucky Run - San Francisco | 13.1M, 10K, 5K | San Francisco, CA | Get ready to lace up your shoes and celebrate the spirit of St. Patrick's Day. Join a lively community of fellow revelers as you don your favorite green gear. |
| 03/14/2026 | Whale Run and Walk | 13.1M, 10K, 5K | Fort Bragg, CA | Whale Run kicks off the Whale Festival! The ocean and trails are as magnificent as ever and we know you will love the breathtaking white water views (including whales) and all the festivities on race day. |
| 03/15/2026 | Shamrock'n Half Marathon | 13.1M | Sacramento, CA | The Shamrock'n 5K, 10K and Leprechaun Dash will be on Saturday. The Shamrock'n Half Marathon will be on Sunday. |
| 03/15/2026 | St Patrick's Day Run | 4M, 2M | Fresno, CA | Whether you run or walk the Shamrock 4 Miler or our GREEN Leprechaun 2 Miler you'll have a great time..... |
| 03/18/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 03/21/2026 | 5K & Polar Plunge - Bay Area | 5K | San Francisco, CA | This event is an iconic tradition in which brave supporters raise funds for Special Olympics by taking a quick dip in chilly waters. |
| 03/21/2026 | Byxbee parkrun | 5K | Palo Alto, CA | Byxbee parkrun takes place every Saturday at 8:00am. |
| 03/21/2026 | Eat.Learn.Play. Kid's Run | 1M, .5M, .25M | Oakland, CA | Welcome to the Oakland Kid's Celebration of Play. We have running distances for ages 0-12 years as well as activities and music. |
| 03/21/2026 | Marina Double 15K | 15K, 10K, 5K | Brisbane, CA | This course is one of the most beautiful in the Bay Area. Run either the 10K, 5K Run/Walk or the Double Double 15K. |
| 03/21/2026 | Mighty Dog Trail Runs | 10K, 5K | Granite Bay, CA | This event offers two distances: 5K and 10K - both for walkers, runners and their dogs! |
| 03/21/2026 | Napa Valley Trail Marathon | 26.2M, 13.1M, 10K | Calistoga, CA | The course is a bit challenging with the hills, streams and rocks - which makes it all the more exciting and rewarding. |
| 03/21/2026 | Rattlesnake Dick | 50K, 25K, 10K | Cool, CA | The year is 1856. Rattlesnake Dick, known as the Pirate of the Placers, stalks the Auburn hills. Join our outlaw posse and race to find his stolen loot. |
| 03/21/2026 | Redwood Trail Run Spring | 50K, 26.2M, 30K, 13.1M, 5M | Oakland, CA | The course travels through beautiful Redwood Regional Park. |
| 03/21/2026 | South Hills Single Track Trail Run | 50K, 26.2M, 16M, 13.1M, 9M ,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. |
| 03/21/2026 | Spirit of Benny | 10K, 5K | Placerville, CA | The Spirit of Benny® is more than another 5K or 10K race. It is an annual celebration to honor the memory of a special boy while helping others in difficult circumstances. |
| 03/21/2026 | TRUSS Wines 5K Wine Run | 5K | Paso Robles, CA | Join us for an amazing tour of this iconic landscape and enjoy some amazing locally produced wines after the event! |
| 03/22/2026 | Bakersfield Marathon | 26.2M, 13.1M, 10K, 6K | Bakersfield, CA | The Bakersfield Marathon has a race for everyone! You will enjoy the scenic courses through Downtown Bakersfield. |
| 03/22/2026 | Lag Bon 10K | 10K | Fairfax, CA | A trail running fundraiser dedicated to World Water Day. |
| 03/22/2026 | LMJS 4th Sunday Run | 15K, 10K, 5K | Oakland, CA | All those interested in running, whether beginner, walker, jogger or competitive racer are welcome to join our monthly runs. |
| 03/22/2026 | Modesto Marathon | 26.2M, 13.1M, 10K, 5K | Modesto, CA | The flat, fast course will be open 7 hours, allowing adequate time for first-time marathoners. |
| 03/22/2026 | Oakland Marathon | 26.2M, 13.1M, 10K, 5K | Oakland, CA | This event has been nationally recognized as the Bay Area race to run by Competitor Magazine. The people of Oakland make you feel welcome from start to finish. |
| 03/25/2026 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) route through the Marina Neighborhood and the Presido. |
| 03/28/2026 | Bad Ass Backyard Ultra | 4.16M | Rio Linda, CA | In the traditional style, runners will have one hour to complete each 4.16M loop. Each new loop will begin every hour on the hour. |
| 03/28/2026 | Boardwalk Fun Run | 5K, 1K | Santa Cruz, CA | Lace up your shoes and join the fun with this family friendly race through the Santa Cruz Beach Boardwalk. Run, jog or walk along the course. |
| 03/28/2026 | Byxbee parkrun | 5K | Palo Alto, CA | It is a 5km run - it's you against the clock. Every Saturday at 8:00am. |
| 03/28/2026 | Doggie Dash | 5K | Redding, CA | The Doggie Dash 5k Fun Run is a dog-friendly event perfect for the whole family! |
| 03/28/2026 | Folsom Lake Falcon Crest Trail Run | 13.1M, 8M, 10K, 5K | El Dorado Hills, CA | TBD. This race is run in the beautiful, awesome foothills of El Dorado Hills. The courses are fast to run on - and lots of fun. |
| 03/28/2026 | Knickerbocker Canyon Trail Run | 35K, 13.1M, 10K, 5K | Auburn, CA | Participants of this race will run the historic Western States Trail along the banks and canyons of the American River. |
| 03/28/2026 | UHC Foundation Summer Fun Run | 10K, 5K | Fresno, CA | Get ready to lace up your sneakers! Join our community members and experience the thrill of the electrifying day at Woodward Park and make meaningful memories. |
| 03/28/2026 | Western Pacific Half Marathon | 13.1M, 10K, 5K | Fremont, CA | All races start and finish at Quarry Lakes Recreation Area. The courses are mostly dirt/fire trail with a very small portion of pavement at the beginning and end. |
| 03/28/2026 | Zoom San Francisco | 13.1M, 10K, 5K | San Francisco, CA | All races start and finish at Crissy Field and head west along the Golden Gate Promenade. All races offer spectacular and historic views of San Francisco. |
| 03/29/2026 | Golden State 5K | 5K | San Francisco, CA | Lace up your running shoes! Thrive City and Mascot Sports are excited to announce this happening! |
April 2026
| Date | Event | Distance | Location | Description |
|---|---|---|---|---|
| 04/01/2026 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) route through the Marina Neighborhood and the Presido. |
| 04/04/2026 | American River 50 Mile Endurance Run | 50M, 25M | Folsom, CA | American River has become the second largest 50 miler in the United States. |
| 04/04/2026 | Antioch Rotary Club Bunny Hop 5K | 5K | Antioch, CA | This coming year we invite participants to run like the Hare or pace yourself steady to victory like the Tortoise. |
| 04/04/2026 | Byxbee parkrun | 5K | Palo Alto, CA | It is a 5km run - it's you against the clock. Every Saturday at 8:00am. |
| 04/04/2026 | Diablo Trails Challenge | 50K, 13.1M, 10K, 5K | Walnut Creek, CA | With distances suitable for everyone from those hitting the trails for the first time to experienced ultra-runners, the Diablo Trails Challenge was created to help celebrate. |
| 04/04/2026 | Golden Gate Headlands Marathon | 26.2M, 13.1M, 10K | Mill Valley, CA | The course is a combination of single track hiking trails and fire roads. |
| 04/04/2026 | San Jose Spartan | 50K, 21K | San Jose, CA | Ultra and Beast. Spartan is more than a race; it’s a mindset, a training ground, and a call to live life The Hard Way — with resilience, grit, and zero shortcuts. |
| 04/04/2026 | Silver Moon Race | 100M | Reedley, CA | How many laps can you run in 6, 12, or 24-hours? Test your endurance and build up your distance in a 2-mile lap race, or go for the 100-mile distance. |
| 04/05/2026 | San Jose Spartan | 10K, 5K | San Jose, CA | Super and Sprint. Spartan is more than a race; it’s a mindset, a training ground, and a call to live life The Hard Way — with resilience, grit, and zero shortcuts. |
| 04/08/2026 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) route through the Marina Neighborhood and the Presido. |
| 04/11/2026 | Byxbee parkrun | 5K | Palo Alto, CA | It is a 5km run - it's you against the clock. Every Saturday at 8:00am. |
| 04/11/2026 | GO2 Foundation Walk/Run - Sacramento | 5K | Sacramento, CA | TBD. Whether you walk or run the 5k, participate remotely or in person, come alone or recruit a team, you can step out, and raise funds for everyone impacted by lung cancer. |
| 04/11/2026 | Lake Sonoma 50 | 50M, 26.2M, 13.1M | Healdsburg, CA | All of the courses boast of “relentless” rolling hills surrounding beautiful Lake Sonoma. |
| 04/11/2026 | Romancing the Island Half | 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. |
| 04/11/2026 | SPASM Lake Chabot | 50K, 26.2M, 30K, 13.1M, 5M | Castro Valley, CA | The course starts at the Marina and travels around the popular Lake Chabot reservoir and surrounding hills. Great course for first-time trail runners! |
| 04/12/2026 | Bowman Run with the Bulls | 5K | Auburn, CA | The scenic course winds through the heart of Auburn — The Endurance Capital of the World — showcasing its beauty and spirit. |
| 04/12/2026 | California Gold Rush Run | 15K, 10K, 5K | Coloma, CA | TBD. Run entirely inside the Marshall Gold Discovery State Historic Park, set in the beautiful foothills of Coloma along the south fork of the American River. |
| 04/12/2026 | Napa Valley Endurance Run | 50K, 35K, 13.1M | Calistoga, CA | Join us for the Napa Valley Endurance Run, three events run in glorious Robert Louis Stevenson State Park, which starts and finishes at Logvy Park in downtown Calistoga. |
| 04/12/2026 | Run Rocklin | 13.1M, 12K, 5K | Rocklin, CA | Run Rocklin has been a beloved event in the community for 22 years. |
| 04/12/2026 | Ruth McKenzie Preserve Half Marathon | 13.1M, 10K, 5K | Friant, CA | The Ruth McKenzie Table Mountain Preserve is located between Friant and Prather, on the north side of Auberry Road. |
| 04/12/2026 | Wildflower Run | 10K, 5K | Morgan Hill, CA | The Wildflower Run is a 501(c)3 non-profit event, run by volunteers and organized by the Morgan Hill branch of AAUW (American Association of University Women). |
| 04/15/2026 | Fog City Run | 5K | San Francisco, CA | The course is a hilly 5km (ish) route through the Marina Neighborhood and the Presido. |
| 04/18/2026 | Annadel Half Marathon | 13.1M, 10K, 5K | Santa Rosa, CA | The Annadel Half Marathon is a non-profit fundraising event. Over the past 16 years, we have raised funds to make the park a more beautiful place for all to enjoy! |
| 04/18/2026 | Byxbee parkrun | 5K | Palo Alto, CA | It is a 5km run - it's you against the clock. Every Saturday at 8:00am. |
| 04/18/2026 | Horseshoe Lake Trail Run | 50K, 26.2M, 30K, 13.1M, 5M | Palo Alto, CA | The course is within Skyline Ridge, Long Ridge and Russian Ridge Open Space Preserves. Be prepared for spectacular views of the Pacific Ocean and the Santa Cruz Mountains. |
| 04/18/2026 | Leona Divide | 100K, 50M, 50K, 30K | Green Valley, CA | We are all set and look forward to seeing you out on the beautiful Leona Divide course! The 100k is a Western States Qualifier. |
| 04/18/2026 | Miss Winkles Fast and Furriest 5K | 5K | Clovis, CA | Join us for our annual 5k / 2 mile race to support the pets at Miss Winkles Pet Adoption Center! |
| 04/18/2026 | Nelson Family Vineyards Wine Run 5K | 5K | Ukiah, CA | Like Running or Walking? Love Wine? This race is for you! |
| 04/18/2026 | No Foolin' Foot Race | 18K, 10K, 5K, 1K | San Carlos, CA | Explore San Carlos' outstanding trail system as a runner in the annual No Foolin' Foot Race! |
| 04/18/2026 | Outlands 50K and 50M | 50M, 50K | Pilot Hill, CA | This isn’t just another trail race—it’s a battle against the elements, the clock, and yourself. |
| 04/18/2026 | PMA 5K/10K Trail Run | 10K, 5K | Porterville, CA | Join us for a 5k or 10k dirt path course that is an out-and-back route. |
| 04/18/2026 | Sierra Azul Trail Challenge | 50M, 26.2M, 20M, 13.1M, 7M, 5K | Los Gatos, CA | TBD. Set in the Sierra Azul Open Space Preserve, this one of a kind running event provides unique access to gorgeous trails and scenery not commonly viewed. 100% trail/fire road. |
| 04/19/2026 | Paseo De Mariposa | 12K, 5K | Mariposa, CA | Join us for the seventh annual Paseo de Mariposa Trail Run, featuring 5K and 12K courses that begin at the historic Mariposa Courthouse. |
| 04/19/2026 | Visalia Half Marathon | 13.1M, 10K | Visalia, CA | This Course is FLAT & FAST with paved trails, closed roads, DJ’s, and MORE! |
| 04/22/2026 | Fog City Run | 5K | San Francisco, CA | A hilly 5km(ish) route through the Marina neighborhood and the Presidio. |
| 04/23/2026 | Canyons Endurance Runs | 100M | Foresthill, CA | Starts in the historic gold-rush town of Auburn, birthplace of mountain ultras, located in the northern California foothills of the Sierra Nevada range. |
| 04/25/2026 | American River Parkway Half Marathon | 13.1M, 5K | Sacramento, CA | The Parkway Half Marathon has been an annual spring-time tradition for runners and walkers in the Sacramento region for 19 years! |
| 04/25/2026 | Byxbee parkrun | 5K | Palo Alto, CA | It is a 5km run - it's you against the clock. Every Saturday at 8:00am. |
| 04/25/2026 | California Classic Half Marathon | 13.1M, 10K, 5K | Fresno, CA | Join us when we host 2,000 runners in our Half Marathon, 10k and 5k Run as participants run through Sea Lion Cove with a grand finish at Chukchansi Stadium. |
| 04/25/2026 | Canyons Endurance Runs | 100K, 50K | Foresthill, CA | Canyons 100K distance is a Western States 100 Golden Ticket race where the top two female and male finishers earn direct entry to the Western States 100. |
| 04/25/2026 | Empower Wellness Run 5K | 5K, 1M | Bakersfield, CA | Run, walk, or crawl, everyone is welcome. Choose between 5k or the 1 mile. |
| 04/25/2026 | Mt. Tam Wild Boar Half Marathon | 13.1M, 10K | Mill Valley, CA | Parts of this course include very narrow trails with steep drop-offs. The event is limited to 300 participants so don't wait too long to register! |
| 04/25/2026 | Nail the Rail Half Marathon, 10K & 5K | 13.1M, 10K, 5K | Shasta Lake, CA | Join us for a stroll along the Sacramento Rail Trail. |
| 04/26/2026 | Big Sur International Marathon | 26.2M, 21M, 11M, 12K, 5K | Big Sur, CA | The course is from Big Sur to Carmel on scenic Highway 1, the nation's first nationally-designated Scenic Highway. The course is USATF certified and is an official Boston qualifier. |
| 04/26/2026 | Chocolicious 5K/15K | 15K, 5K, 2M | Fresno, CA | Welcome to the Chocolicious 15k, 5k and 2 Mile Run/Walk! Run or Walk one of our three courses and EARN the right to have your chocolate and eat it too! |
| 04/26/2026 | Lace Up For Learning Charity Run | 10K, 5K | Folsom, CA | This event reflects our dedication to making a meaningful difference in the education of young students around the world. |
| 04/26/2026 | LMJS Fourth Sunday Race | 15K, 10K, 5K | Oakland, CA | Every month except February, March, and June. |
| 04/26/2026 | Mud Factor - Fresno | 5K | Sanger, CA | 5k obstacle run. |
| 04/29/2026 | Fog City Run | 5K | San Francisco, CA | The Fog City Run is a hilly 5km (ish) route through the marina neighborhood and the Presidio. |
May 2026
| Date | Event | Distance | Location | Description |
|---|---|---|---|---|
| 05/01/2026 | Cinco de Mile 5 Que - Fresno 5K | 5M, 5K | Fresno, CA | Come and celebrate "5 Cinco de Mayo" at this UNIQUE EVENT! Run this SCENIC COURSE out and back along Woodward Park. MUSIC ENTERTAINMENT before, during and after your run. |
| 05/02/2026 | Big Climb San Francisco | Stair Climb | San Francisco, CA | Step up to take cancer down! To create a world without blood cancers, every step counts. You are helping to change lives! |
| 05/02/2026 | Byxbee Park Run | 5K | Palo Alto, CA | Byxbee Parkrun is a free, fun and friendly weekly 5K community event. The run starts at 8am. |
| 05/02/2026 | Cinco de Mayo Run - Los Angeles | 13.1M, 10K, 5K, 1M | Los Angeles, CA | Challenge yourself and celebrate resilience, community and culture with the Cinco de Mayo Run Against All Odds! |
| 05/02/2026 | Cinco de Mayo Run - Sacramento | 13.1M, 10K, 5K, 1M | Sacramento, CA | Challenge yourself and celebrate resilience, community and culture with the Cinco de Mayo Run Against All Odds! |
| 05/02/2026 | Cinco de Mayo Run -San Francisco | 13.1M, 10K, 5K, 1M | San Francisco, CA | Challenge yourself and celebrate resilience, community and culture with the Cinco de Mayo Run Against All Odds! |
| 05/02/2026 | Foster City 5K Fun Run | 5K | Foster City, CA | TBD. Save the date. Get Ready to Run! Whether you are a seasoned runner or just looking to enjoy a leisurely jog, this 5K distance promises an invigorating experience. |
| 05/02/2026 | Hacienda Hills Run | 50K, 26.2M, 30K, 13.1M, 9M, 10K, 5K | San Jose, CA | This event is located just outside San Jose at the Alameda Quicksilver Park. Prepare yourself for a spectacular day of California Trail running in the Hacienda Hills. |
| 05/02/2026 | Kerman Almond Festival Scholarship Fun Run | 5K | Kerman, CA | All family members are invited to join the fun! The fun includes a festival with live entertainment, food vendors, Almond Baking Contest and wine tasting. |
| 05/02/2026 | Miwok 100K | 100K | Stinson Beach, CA | The Miwok 100K is one of the most beautiful and inconic trail ultramarthons in the world. The race is very competetive at the front and a rewarding challenge for all. |
| 05/02/2026 | OC Running Festival - US Bank 5K Run | 5K | Costa Mesa, CA | We not only run for ourselves but for everyone around the world. Put the tech down and get outside. Feel the energy of the sun. |
| 05/02/2026 | Steps for Strength BAYS 5K & 10K | 10K, 5K | Campbell, CA | Bay Area Young Survivors will host this annual event. It kicks off as a health resource fair, followed by the 5K and 10K run/walk. |
| 05/02/2026 | Sunrise Marathon - Sacramento | 13.1M, 10K, 5K, 1M | Sacramento, CA | Run at sunrise with fantastic views! Start your day - and your journey - with a breathtaking sunrise and fellow runners chasing greatness! |
| 05/02/2026 | Sunrise Marathon - San Francisco | 13.1M, 10K, 5K, 1M | San Francisco, CA | Run at sunrise with fantastic views! Start your day - and your journey - with a breathtaking sunrise and fellow runners chasing greatness! |
| 05/02/2026 | Wild West Marathon & Ultra | 50M, 50K, 26.2M, 10M | Lone Pine, CA | Ready for the challenge? This is one of the third oldest trail races in the US. If you are seeking a day of adventure this event offers an experience like no other! |
| 05/02/2026 | Wildflower Experience 5K/10K | 10K, 5K | Bradley, CA | With Mother Nature as its venue it is sure to be the California destination race for years to come…celebrating multi sports, music wellness and outdoor adventure! |
| 05/03/2026 | Avenue of the Giants | 26.2M, 13.1M, 10K | Weott,CA | The Avenue of the Giants is staged in the Humboldt Redwoods State Park. The paved course winds through giant old growth Redwoods. |
| 05/03/2026 | Aztec Run | 5K | Oakland, CA | The Spanish Speaking Citizens' Foundation (SSCF) is pleased to bring you this fun-filled, family-friendly event to lift spirits and build community in celebration of Dia de los Muertos. |
| 05/03/2026 | Bay Bridge Half Marathon | 13.1M | Oakland, CA | Welcome to the only event across the Bay Bridge. We are focused on a mission to bring you a one-of-a-kind, fresh experience to our hometown. |
| 05/03/2026 | Cinco de Mile Half Marathon and Ole 5Que - Bakersfield | 13.1M, 5K | Bakersfield, CA | Come and celebrate "5 Cinco de Mayo" at this UNIQUE EVENT! Run this SCENIC COURSE out and back along Woodward Park. |
| 05/03/2026 | Devil Mountain Run | 10K, 5K, 1M | Danville, CA | This is one of the Bay Area's oldest running traditions in Downtown Danville the first Saturday in May. |
| 05/03/2026 | My Heart Counts 5K | 5K | Stanford, CA | The My Heart Counts 5K and cycling events support the Stanford Center for Inherited Cardiovascular Disease. |
| 05/03/2026 | Tails & Trails | 5K | Windsor, CA | We support animals and the people who love them through rescue, rehoming, spay/neuter and education. Walk - Run - Race (with your dog!). Run for the rescues…Dogwood Animal Rescue Project. |
| 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 | 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. |
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