Trail Running Calendar California 2026-2027

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 hourly loop event at Smith Ranch in Bradley, California where runners repeat a 4.18 miles loop until one runner completes a final lap. The course is on dirt trails and ranch roads with a staffed aid station and on site camping.

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.

Multi-day trail running at Smith Ranch in Bradley, CA, featuring 5 km, 10 km, 20 km, 24-hour and 48-hour formats on a 10 km dirt single-track loop with aid stations roughly every 3 miles; primitive onsite camping and nightly bonfires.

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.

An evening trail event in Topanga with a timed 10k featuring about 1,360 ft of climbing and a non-timed 4.5-mile Hiker's Delight, plus aid stations, post-race amenities and shuttle-only parking.

Trail running event in Las Trampas Wilderness offering Half Marathon, 10K and 5K; the half marathon is noted as non-flat and features trails and views.

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.

Black Oak Challenge in Tuolumne on September 19, 2026 features a 5K with on-course physical and mental challenges and a 1K family run with water obstacles. Finisher medals are awarded to 5K finishers.

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.

Dick Collins Firetrails in Castro Valley on September 26, 2026 features a Bay Ridge 100k, a Firetrails 50 mile and the Golden Hills Marathon with UTMB Index status and organizer specified time limits.

25K and 50K trail ultras on Mt. Wilson in the Angeles National Forest, featuring technical single track, regular aid stations, and significant elevation gain.

A half marathon at Twin Lakes near Bridgeport, CA on September 26, 2026. The point to point course follows the lake with downhill and ridge climbs between about 7,100 ft and 6,600 ft, and includes shuttles and aid stations.

Bandit Ultra Trail in Simi Valley on September 26, 2026 offers 50K, 30K and 15K trail courses through Rocky Peak and Tapo Canyon. The event is based at Corriganville Park and includes multiple aid stations and varied terrain.

Community supported run in Belmont offering 5K, 10K, a kids mile, a Fido mile for dogs, and a virtual option with shirts and medals for most participants.

Trail marathon, half marathon and 5 mile at Andrew Molera State Park in Big Sur with Old Coast Road climbs, marked aid stations, and a 300 runner limit.