Trail Running Calendar California 2026-2027

A 100K trail race in Cuyamaca Rancho State Park near Julian, CA, run over three distinct loops that include Cuyamaca Peak and sections of the PCT. The 2026 race is a 2027 Western States qualifier.

A 9.1 mile mountain trail race at Mt Baldy on October 3, 2026, featuring 3,926 feet of vertical gain. Multiple divisions offer gear and cash prizes, timing with a disposable chip, and the event is capped at 700 entries.

Experience a trail half marathon on San Bruno Mountain featuring 2,400 feet of elevation gain and stunning views. Enjoy a scenic route with 93 percent trail coverage followed by a post race meal and finishers medal.

Run by the Sea at Wilder Ranch State Park on October 4, 2026 offers a Half Marathon, 12K and 4K run/walk along mostly flat packed dirt trails with coastal bluff and Monterey Bay views. Organized by the Santa Cruz Track Club; proceeds benefi..

Kokanee Trail Runs in South Lake Tahoe on October 4, 2026 offers a half marathon, 10K, 5K and a noncompetitive half mile for children, scenic views of Lake Tahoe, aid stations with Tailwind, and proceeds benefiting local charities.

A 5K at Ernie Howlett Park on the Palos Verdes Peninsula with a shaded horse-trail course, in-person and virtual options, and a fundraising entry where raising $100 covers registration and benefits Strides in Recovery.

A two day trail festival in Big Bear Lake, California featuring five distances and varied terrain around the lake. The 2026 event is the UTMB World Series Americas Major and serves as a dual qualifier for UTMB Finals and Western States.

Trail races in Auburn, CA along the American River Canyon with 50K, half marathon, and 5-mile options, post-race cider and a commemorative glass, plus age group awards and a charity matching program.

Test your endurance at Lake Merced in San Francisco with a scenic 4.5 mile loop course. Choose between a standard run or tackle ultra marathon distances including the 50K and 50 mile events.

Trail races of 50 Mile, 50K and 30K through Cleveland National Forest near Silverado CA on remote forest roads with significant climbing, staffed aid stations, drop bag support, and specific crew and pacer rules.

Granite Head Trails & Ales Trail Races feature 6.6-mile and 11.2-mile courses. Runners get a tech T-shirt and can enjoy post-race fajitas and a beer. The event is the final race in a local trail running series.

A trail race at Almaden Quicksilver County Park with distances from 5K to 50K. Courses are out-and-back, marked with colored ribbons, include aid stations and toilets, and the longer races reach Bald Mountain and Mt. Umunhum.

A 12.4 mile loop from Mitchell Canyon to the Mount Diablo summit and back, featuring about 4,000 feet of climbing and descending. The entry fee includes shuttle service, a raffle entry, and a finisher item.

A trail event around San Pablo and Briones Reservoirs offering 5K, 10K, half marathon and 35K on single track and fire roads. Aid stations, race shirts, and a 300 runner capacity are part of the event.

A rugged fatass trail event near Foresthill, CA offering 25 mile and 50 mile options with extensive off trail sections, large climbs, limited to 50 entrants, free to enter.

Trail races in Nevada City on October 11 2026 include a new half marathon plus 10K and 5K options. Courses mix pavement gravel and single track with aid stations and historical points along the way.

Point to point trail races on the Bizz Johnson Trail in Lassen National Forest featuring a USATF certified Boston qualifier marathon, a 50K, an Express half and a 10K with remote starts and aid stations.

Ruff Run California on 10/17/2026 in Phelan, CA presents a 20 acre obstacle course for people and their dogs with over 20 obstacles, 4K and 1K options, and an after party with music, games and vendors.

A multi-format running event on the Cahuilla Indian Reservation in Anza, California, offering fixed-time races, a 100-mile option, a half marathon and a Tribal Member 5k while fundraising for youth and family programs.

A trail running event in Cool, California on October 17, 2026 offering 5k, 10k and a half marathon. Proceeds benefit Black Oak Mines Unified School District youth programs and help fund a scholarship to Camp Taylor.