Trail Running Calendar California 2026-2027

A memorial stair climb in San Diego on September 5, 2026 honoring the 403 emergency responders of 9/11 and raising funds for FirefighterAid.

A community-focused trail running event in Butte Meadows on September 5, 2026 with 5k, 12k, and 24k routes, aid stations, swag, and proceeds supporting local trail groups.

A community event in Norwalk on September 5, 2026 featuring a 3 mile in-person and virtual run, a youth sprint and a high school invitational.

Trail races at Mammoth Bar OHV Area in Auburn State Recreation Area on September 6, 2026. Options include a 13.1 mile half marathon and a 6.2 mile 10K, each with notable elevation gain and staffed aid stations.

Experience the natural scenery of Mount Diablo State Park through a variety of trail races. Runners can select distances ranging from 4 miles to a 50K with spectacular views of the San Francisco Bay Area.

Community races at Thousand Hills Ranch include a 5K, 10K and Kids Mile on mixed dirt and paved ranch roads. The event benefits Central Coast Athletics Foundation and 17 Strong and features a victory lap, festival, awards, and team competit..

A 6.45 miles trail race in Annadel State Park organized by the Empire Runners Club, held in early September with staggered age and gender starts, limited to 100 runners and awards for the top 13 finishers.

The 61st Mt Baldy Run to the Top on September 7, 2026 is a fundraising mountain trail race in the Angeles National Forest covering about 7 miles with 4,000 feet of ascent to the 10,064 foot summit, with proceeds aiding local services.

Experience the trails of China Camp State Park with a selection of distances including a 5K 10K and Half Marathon. Participants enjoy a post race festival with beer steins custom medals and local snacks.

A point-to-point trail run around Emerald Bay of about 7 miles (approximately 11 to 12 km). The single-track course includes granite steps and moderate climbs and finishes at Lester Beach with shuttle service back to the start.

Trail running festival in Mendocino Woodlands Park offering 10K, Half marathon and 6 hour and 12 hour timed events with camping and weekend food options.

Tough Mudder Big Bear on September 12 2026 at Bear Mountain offers 5K and 10K obstacle courses, finisher items, Mudder Village passes, and group packages.

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 5 km Stadion obstacle race with 20 obstacles at Angel Stadium on September 12, 2026, plus a 1-1.5 km kids race and spectator access.

Trail races at Tilden Regional Park in Berkeley with distances from 10K to 50K, cupless aid stations about every 5–7 miles, and a 350-runner capacity.

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.

A trail race at Stevens Creek County Park in Cupertino offering a Half Marathon, 11K, and a charity 2.5-mile Lollipop Loop with aid stations and post-race barbecue.

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.