Trail Running Calendar California 2026-2027

Experience a diverse weekend of trail running and off road duathlon at San Diego’s Scenic Lake Hodges. Choose from distances ranging from a kid’s mile to a 50K ultra marathon or tackle the mountain bike and run challenge.

Trail races at Vasquez Rocks in Agua Dulce on October 17, 2026 offer looped 5K, 10K, 15K and Half Marathon+ courses across rocky, sandy and single track terrain. The 15K and Half Marathon+ include a roughly 500 foot black hole tunnel.

Multiple runs and a walk in Springville, CA on October 17, 2026, with distances from a half mile kids run to a 10K trail held mostly on dirt roads and single track trails as part of the Apple Festival.

A trail run at Whiskeytown National Recreation Area on October 17, 2026, with roughly 9 miles, 20.5 miles, and a 52K 32 mile option. Courses are marked with aid stations, after race food is provided, and proceeds support trail maintenance.

A multi-distance trail event at Lake Sonoma on October 17-18, 2026, offering 100 mile, 50 mile, marathon and relay options. Courses use extensive singletrack with lake views, aid stations, crew access, and free on-site camping for participa..

Trail races in Marshall Gold Discovery State Historic Park offer distances from a Kids Run to a half marathon on singletrack and paved sections, with marked courses, aid stations, a 4.5 hour time limit, and on site parking for a fee.

Trail half marathon and 10K through the Alabama Hills with views of Mt. Whitney. The event supports the John Wayne Cancer Foundation and includes chip timing, aid stations, finisher items and podium prizes.

A trail running event at Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, Half Marathon, 10K and 5K courses on hilly trails where mud and creek crossings are possible.

The Peak offers 50K, marathon and half marathon courses that climb Cuyamaca Peak via single-track trails, with aid stations at Sweetwater and Cuyamaca Peak and GPS course files provided. Registration opens April 1, 2026.

A 5k cross country race run in two loops around Willow Hill Reservoir next to Folsom High School, part of the Pacific Association USATF Cross Country Grand Prix, with a $75 bonus for breaking an age group record.

Test your limits in Upper Bidwell Park with a challenging half marathon featuring 1,600 feet of climbing or a unique eight hour backyard endurance challenge on scenic single-track trails.

Trail races at Hahamongna Watershed Park on October 18, 2026 offering half marathon, 10K and 5K distances. The half marathon is presented as the organizer's flagship trail event and is reported to sell out quickly.

A themed charity run and community festival on October 18, 2026 in Downtown Roseville, CA, supporting the bleeding disorders community. The day includes a timed 5K, a one mile walk, festival food, carnival games, and a remembrance ceremony.

Weekend at Burney in Burney, California is a three day trail event in October offering 48 hour, 24 hour, 12 hour, 13.8 mile and 4.8 mile race formats, run as cupless events with community and nonprofit partnerships.

An endurance event at Beals Point in Granite Bay where runners complete an hourly 4.16 mile loop until one remains. A 12 hour Mini Last Person Standing uses the same format with a fixed time limit.

A repeating 4.16-mile trail loop event at Beals Point where runners start a new lap each hour until one remains; a Mini version ends after 12 hours. Aid is only at the start/finish and personal aid areas are encouraged.

A 200 mile multi-day endurance run around San Diego County held October 23–26 in Escondido, California. The race has an 82 hour limit, requires a crew, and is limited to 24 experienced ultrarunners.

A trail race weekend at Los Coyotes Reservation featuring Single Loop, 6H Ultra and 24H Ultra options across desert and alpine trails. Ragnar Village provides camping, bonfires, food trucks and evening activities.

A team trail relay at Los Coyotes Reservation on October 23 and 24, 2026 featuring desert and mountain single track, a 112.8 mile course shared across teams, and on site camping plus glamping at Ragnar Village.

A trail running event at Caspers Wilderness Park on October 24, 2026, offering 10k, half marathon, 35k, marathon and 50k courses. Courses are described as marked and supported, with an athlete guide and past results available.