Trail Running calendar near Vacaville 2026-2027

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.

Join the Vampire Run in Roseville for a timed 5K or a 1 mile walk to support the bleeding disorders community. Enjoy a festive atmosphere with costumes, carnival games, and medals for all runners.

The NorCal Backyard Ultra is a unique last-person-standing trail race at Folsom Lake. Runners face a 4.2-mile loop each hour, with the main event having no set finish and a "Mini" version capped at 12 hours. Every participant receives custo..

The NorCal Backyard Ultra presents two endurance challenges at Folsom Lake. Runners tackle a 4.16-mile loop every hour, with a main Last Person Standing event and a 12-hour Mini version. All participants receive custom awards, and the event..

A very difficult, remote on and off trail fatass in the northwestern Sierra Nevada near Oxbow Reservoir. Three routes run from 15+ to 43+ miles with large elevation gain and multiple water crossings.

A trail race on October 24, 2026 near Pilot Hill, California featuring a half marathon (two laps) and a 10K on single-track trails with creek crossings, climbs, and a Folsom Lake overlook; field limited to 175 and proceeds benefit the Ameri..

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.

Celebrate Halloween with a trail race through San Jose Hellyer County Park. Choose from distances including 5K 10K Half Marathon and Marathon with costume prizes and certified courses.

Trail races in Almaden Quicksilver Park from 5K to 50K over hilly dirt roads and single-track, with two staffed aid stations, drop-bag service for longer distances, and a finisher medal for all 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.

Event Details The Rio Del Lago 100 Mile Endurance Run is a trail race held on Saturday, November 7, 2026, starting at Beal's Point in Folsom Lake State Recreation Area, within the Sierra Foothills of California. Course Information The 100-m..

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.

A multi-distance trail event in the El Dorado Hills foothills offering routes from 5K to a trail marathon on mostly single-track dirt with rolling hills, aid stations, drop-bag service, and a creek crossing.

Trail race at Darrington Trail Head by Folsom Lake offering 5K, 10K, 18M and 36M on rocky single-track with rolling hills, aid stations, drop bags, and a 10-hour overall time limit.

Celebrate Thanksgiving at Hellyer County Park with a trail race along Coyote Creek. Choose from a USATF certified half marathon, 10K, or 5K while competing for a chance to win a turkey.

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.