Trail Running calendar near Santa Rosa 2026-2027

A multi-distance trail event at Lake Sonoma on October 17-18, 2026 offering 100 Mile, 50 Mile, marathon and 4-person relays on singletrack with substantial elevation and on-site camping.

Experience the trails of Walnut Creek at the Diablo Summit Stomp 2026 featuring 30K, Half Marathon, 10K, and 5K courses. Walkers and hikers are welcome to join this trail event at Castle Rock Road.

Run through the lush single track trails and babbling streams of Bothe Napa Valley State Park. This exclusive event offers marathon, half marathon, and 10K distances for a maximum of 300 participants.

Support student programs and the Oakland Tech Cross Country team at Joaquin Miller Park. Choose between a five kilometer trail race or a one mile fun run through the redwood trees.

A trail event at Huddart Park on November 7, 2026, featuring multiple distances from a youth dash to a 6 Hour Challenge, single-track redwood trails, aid stations, chip timing, and a post-race pancake breakfast.

Lake Chabot Trail Run in Castro Valley on November 7, 2026 offers distances from an 8K to a 50K plus a free kids 50 yd dash. The marked trail circles the reservoir with aid stations every 4 to 5 miles and a cupless policy.

Mt. Tam Trail Run offers 10K, half, 30K and 50K trail races at Mt. Tamalpais State Park with technical singletrack, chip timing, cupless aid stations, and a 500 runner capacity.

Experience a flat and fast trail race through the scenic Quarry Lakes Regional Recreation Area in Fremont. Choose from a USATF certified half marathon, 10K, or 5K while enjoying views along the Alameda Creek Trail.

Quad Dipsea is a 28.4 miles trail event in Mill Valley, California, with about 9,000 feet of elevation gain. The route is an out and back to Stinson Beach repeated twice and includes aid stations at Cardiac Hill, Stinson Beach, and Old Mill..

Join a mostly flat and fast half marathon, 10K, or 5K in Fremont. Support the local food bank and earn a special connector medal by completing the Double Turkey Challenge over Thanksgiving weekend.

Escape the wrath of Krampus with this themed cross-country run in San Francisco or from anywhere. Choose from 5K, 10K, or a nine-mile course. All finishers get unique Krampus themed swag, including a woodallion and beer stein.

The Hunter S. Thompson Fear & Loathing will take place in San Francisco on Sunday 6 December 2026. You can run between 50 and 50 miles.

Celebrate the final day of the year with a trail run at Lake Chabot in Castro Valley. Choose between half marathon, 10K, and 5K distances with options for runners and hikers alike.

Celebrate the first day of 2027 by running or hiking along the scenic trails of Lake Chabot. Choose between a half marathon, 10K, or 5K while supporting the East Bay Regional Parks Campership Program.

Explore the redwood trails of Huddart Park across distances from 8K to 50K. The routes offer varied terrain and significant elevation gain, with full aid station support. All finishers receive a custom medal in this cupless event.

Run through the towering redwoods and lush ferns of Huddart Park in Woodside. This trail event offers multiple distances from a five mile race to a 50K ultramarathon plus a free dash for children.

A trail running event in San Francisco on January 23-24, 2027, offering 15K, 25K, 50K and 50 mile options on soft, hilly trails. The course travels through the Marin Headlands and crosses the Golden Gate Bridge with coastal views.

Experience a scenic run or walk through Fremont with minimal climbing. Choose from 5K, 10K, or Half Marathon distances featuring diverse terrain from wood boardwalks to dirt paths along the bay.

Experience the coastal beauty of the Marin Headlands at the Golden Gate Trail Run. Choose from distances ranging from a 50K trail race to a fun kids dash with views of the Golden Gate Bridge and San Francisco.

Experience a scenic and flat run along the San Francisco Bay shoreline starting from San Leandro Marina Park. This event offers half marathon, 10K, and 5K distances for both runners and walkers.