California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 380 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
October 2026
An October fundraiser offering a global virtual challenge plus an in-person event at San Francisco’s Ferry Building. Multiple distances from 5K to 50K are available; some courses are unmarked and maps are provided. Proceeds support the Breast Cancer..
A multi-distance ultramarathon at Lake Perris featuring 10, 20, 50, 100 and a demanding 200 mile race with looped courses, aid stations, camping and cash prizes for top finishers.
Trail races at Caspers Wilderness Park on October 31, 2026 offering 10k, half marathon, 35k, marathon and 50k routes with marked courses and event support.
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.
A trail event at Crystal Cove State Park on October 31, 2026 featuring a 4 mile loop with about 700 feet of climb per lap and ocean ridge views. The race is USATF sanctioned and part of the Southern California UltraRunner's Grand Prix Series.
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.
November 2026
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.
Trail marathon in the Cleveland National Forest on Kumeyaay Lands held Sunday November 1, 2026; registration opens August 8, 2026 on UltraSignup.
Trail marathon and new 25k in Silverado, CA with routes from Black Star Canyon through Mariposa Reserve and significant elevation gain.
A nighttime 13.1 mile run through Joshua Tree’s desert trails under the stars; headlamp required and finisher medals awarded.
Trail races at Beal's Point near Folsom Lake offering a 100 mile and a 50K course with major elevation, stocked aid stations, drop bag and pacer rules.
A community 5k at Live Oak Park in Tulare supporting the Tulare Sunrise Rotary Club scholarship program; $15 registration covers medals and timing, with finisher medals and age-group awards plus trophies and $100 gift cards for top male and female fi..
Trail trail event at Huddart Park in Woodside offering distances from a 1 mile kids dash to a Sirena 6 hour individual and relay challenge.
Experience a scenic trail run around the Lake Chabot reservoir and hills. With distances from a 50 yard kids dash to a 50K ultramarathon there is an option for everyone at this Castro Valley event.
Trail races from 10K to 50K around Mt Tamalpais, held at Stinson Beach with technical trails, significant climb, cupless aid stations, and chip timing.
Obstacle course weekend at Santa Margarita Ranch with Sprint, Super, Beast, Ultra, kids races and a pre-race obstacle workshop.
A multi-day obstacle race weekend at Santa Margarita Ranch with Sprint, Super, Beast, Ultra and kids races through vineyards and forested hills.
An off-road trail run at Rio Bravo Ranch offering three route options, timed results, stocked aid stations, food, swag and camping.
Night trail running at Marvin Braude Mulholland Gateway Park with marked 5K and 10K courses and required headlamps.
A November trail event at Rancho Cañada del Oro offering distances from 5K to 50K, with steep climbs, single track and two main aid stations. Runners should carry water and be aware of exposed terrain and rattlesnakes.