Trail Running Calendar California 2026-2027

A weekend running festival in Mendocino Woodlands Park featuring a mostly single-track 6-mile loop, two aid stations, and choices of half-marathon, 10K, or 6- and 12-hour timed formats, plus on-site camping and weekend meal options.

Tough Mudder Big Bear on September 12, 2026 is an obstacle mud run at Bear Mountain near Big Bear Lake, California. It offers 10K and 5K courses, spectator and group options, named obstacles, finisher items and a Mudder Village pass.

A chip-timed one-mile uphill trail race to the top of Pincushion Mountain in Friant, CA, with awards and finisher items. A Mountain Goat edition allows multiple timed ascents within a four-hour window and includes special awards.

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 trail running event in Tilden Regional Park near Berkeley offering 50K, 35K, half marathon and 10K courses with stocked aid stations, a cupless policy, and a 350-runner field.

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 trail races at Stevens Creek Reservoir in Cupertino on September 12, 2026 include a Half Marathon, 11K and a 2.5 mile Lollipop Loop. The USATF sanctioned event is hand timed, capped for the longer distances, and supports wildfire reli..

An evening trail event in Griffith Park with a ten mile team relay, a 5K race, and a kid run, featuring scenic sunset views, live music, race photos, and awards for teams and individual winners.

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.

A Last One Standing event in Bradley, California on September 18, 2026 where runners repeat a 4.18 mile loop each hour and must finish each loop within the hour to continue. The final runner to complete a loop is declared the winner.

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 on a private cattle ranch in Bradley, California with looped 10 km single track and events from 5 km to 48 hour. Onsite primitive camping, nightly bonfires and live music with aid stations about every 3 miles.

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.

A Topanga trail event featuring a rugged 10k with about 1,360 ft of climb and a non-timed 4.5 mile Hiker's Delight. The courses run mostly on fireroads with a section of singletrack and include aid stations, food, and post-race amenities.

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.

The Healdsburg Fitch Mountain Footrace is a long running community event in Sonoma Wine Country that raises funds for Corazón Healdsburg and a kids running team. It features 3K and 10K courses beginning and ending near the Historic Downtown..

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..

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.