California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 379 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
September 2026
A 40th edition cross country meet in Golden Gate Park with an approximately 4 mile two loop course over grass, dirt, and rolling hills.
An annual stadium stair climb and memorial walk at UC Davis Health Stadium honoring 9/11 first responders, with proceeds supporting the UC Davis Police Emergency Scholarship.
A repeated 4.18 mile loop race at Smith Ranch where runners must finish each hourly loop to stay in the event; awards include a trophy buckle and participant amulets.
Mile Madness is a looped trail endurance event in Auburn, California, held September 18-21, 2026. Timed events run from 3 to 72 hours with a 0.75 mile loop and options including a 100 mile race plus on-site aid and amenities.
Trail runs at Granite Beach on Folsom Lake with new 10 mile and 5K courses, aid stations, age group awards, a finisher beer glass and a postrace meal.
Trail running at Smith Ranch in Bradley CA with 10 km loop options, 24 and 48 hour events, onsite camping, nightly bonfires and live music.
A community run at George's River Ranch along the San Joaquin River on September 19 2026. Events include a 10K trail, 5K, 2 mile and a kids quarter mile with registrations opening June 1 2026.
10k trail race in Topanga through red sandstone cliffs and oak forest, with aid stations, beer garden, vegan tacos and a non timed 4.5 mile Hiker's Delight.
Trail-based half marathon plus 5K and 10K with hills and scenic views in San Ramon on September 19, 2026; virtual entries available.
A community road and trail event in Fresno on September 19, 2026 offering 10K, 5K, 2 mile, and kids quarter mile races beside the San Joaquin River while supporting Pediatric Trauma injury prevention at Valley Childrens Hospital.
Inaugural Black Oak Challenge in Tuolumne features a 5K with physical and mental obstacles plus a 1 mile family run with water challenges.
Rebels XC Challenge is an in-person cross-country meet in Carmichael CA on September 19 2026 featuring Women's, Masters Men's and Open Men's races with a listed fee of USD 30.
A family friendly 5K run in San Francisco with a scenic course from Mountain Lake Park to the USS San Francisco Memorial and post-race festivities.
Trail 5K with a steep first mile and flat fast finish, plus a kids run and member picnic at San Pedro Valley Park on September 20, 2026.
A multi-distance trail race weekend in Mammoth Lakes featuring technical high-elevation courses, marked routes, aid stations, a cup-less policy, and chip timing.
An urban event in downtown Los Angeles with a stair climb up 1,664 steps at the U.S. Bank Tower, an Urban Hike past major cultural sites, a Heroes Challenge category, and a virtual participation option.
An obstacle course race weekend at Lake Elsinore Raceway with Sprint, Super, kids races, Hurricane Heat events, and spectator access on Sep 26-27, 2026.
A 3.1 mile trail event at Ascot Hills Park in Los Angeles with chip timing and views of Dodger Stadium and the Hollywood sign. Proceeds support the Wilson High School Fire and Police Magnet Cadet Program and Ascot Hills Park.
Trail event in Castro Valley featuring a 100k, 50 mile, and marathon with UTMB index status and firm time limits due to park permits.
25K and 50K trail ultras on Mt. Wilson in the Angeles National Forest, featuring technical single track, regular aid stations, and significant elevation gain.