Trail Running Calendar California 2026-2027

A Stadion 5 km obstacle race with 20 obstacles at Angel Stadium of Anaheim on Sep 12, 2026, plus kids races and spectator tickets; the event lists an average finish time near 1 hour 32 minutes and a 4.8 rating from 40 testimonials.

A September 12, 2026 trail event in Berkeley featuring 10K, half, 35K and 50K courses through Tilden and Wildcat Canyon with chip timing, regular aid stations and a cupless aid policy.

An outdoor mud obstacle run near Redding, CA, with a just-under 5 km course through fields, hills and creek crossings. The family-oriented event includes vendors, children's activities, food, drinks and event swag.

Trail races in Cupertino on September 12, 2026 include a half marathon, an 11K, and a 2.5 mile charity Lollipop Loop. The event is USATF sanctioned, hand timed, and features aid stations and a capped field for the longer distances.

Run through Bishop Ranch and San Ramon in this diverse racing event. Choose between a half marathon, 10k, 5k, or beer mile before enjoying unlimited tastings with your finisher medal.

An evening trail running event in Griffith Park with a 10-mile team relay, a 5K solo race, and a 1K kid run. The course features skyline views, race photos, medals, live music, and team awards.

A trail running event at Calero County Park offering distances from a kids run to a 50K across single-track and dirt roads, with named aid stations, drop bag support, bib color assignments, and time limits for longer races.

The Yosemite Trail Races will take place in Bass Lake on Saturday 12 September 2026. You can run between 13 and 50 miles.

Experience a scenic multisport event at Crystal Cove State Beach featuring swim legs in the Pacific Ocean and a closed bike course on the Pacific Coast Highway. Choose from triathlon duathlon aquabike or trail run options.

The Golden Gate Park XC Open will take place in San Francisco on Sunday 13 September 2026. You can run 4 miles.

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.

Rocky Ridge in San Ramon, CA on September 19, 2026 features a trail half marathon plus 10K, 5K and virtual options. The courses include hills and scenic viewpoints.

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-race trail weekend in Mammoth Lakes with marked courses, aid stations, chip timing, drop-bag services, and prize money. Runners should expect high‑altitude terrain, specific gear recommendations, and cup-less, low-waste race operati..