Trail Running Calendar California 2026-2027

Cahuilla Rez Ultra is a Native organized trail event on the Cahuilla Indian Reservation near Anza, California offering multiple fixed time and distance races on a 2 mile dirt loop. Proceeds support the Cahuilla Band of Indians Youth and Fam..

Trail running in Cool, California with 5k, 10k and half marathon options on Sierra Foothills trails. Proceeds support Georgetown Divide Ready by 21 and a Camp Taylor scholarship; family packages, childcare, and a post-race breakfast are inc..

Experience a diverse weekend of trail running and off road duathlon at San Diego’s Scenic Lake Hodges. Choose from distances ranging from a kid’s mile to a 50K ultra marathon or tackle the mountain bike and run challenge.

Trail running at Vasquez Rocks Natural Park in Aqua Dulce, CA with 13.9 mile, 15K, 10K and 5K race options on October 17, 2026.

Experience the Sierra foothills at the Springville Apple Run featuring trail routes and dirt roads. Choose between 10K and 5K runs or a 2 mile walk as part of the local Apple Festival.

Trail running event at Whiskeytown with 9 mile, 20.5 mile and 52K courses on singletrack and dirt roads; proceeds support trail maintenance.

Multi distance trail running at Lake Sonoma offering 100 mile, 50 mile, marathon and 4 person relays with singletrack, aid stations, drop bags and on site camping.

Trail races in Marshall Gold Discovery State Historic Park offer distances from a Kids Run to a half marathon on singletrack and paved sections, with marked courses, aid stations, a 4.5 hour time limit, and on site parking for a fee.

Trail loops through Alabama Hills with a half marathon and 10K, chip timing, aid stations, and fundraising for the John Wayne Cancer Foundation.

Trail races on Mount Diablo near Walnut Creek on October 17, 2026 offering 30K, Half Marathon, 10K and 5K with possible mud and creek crossings.

Mountain trail event on October 17, 2026 offering 50K, marathon, and half marathon options that climb to Cuyamaca Peak on single track trails, with substantial elevation change and GPX course files available.

A 5k cross country race run in two loops around Willow Hill Reservoir next to Folsom High School, part of the Pacific Association USATF Cross Country Grand Prix, with a $75 bonus for breaking an age group record.

Trail races at Almaden Quicksilver County Park include a half marathon, 10K and a kids one mile fun run with course aid stations and volunteer support.

A community 5K at Sequoia Park on October 17, 2026 where runners may bring dogs. Proceeds support the Sequoia Humane Society and the event features a raffle and adoption opportunities.

Trail races in Upper Bidwell Park featuring a 13.1 mile half marathon and a 4 mile hourly endurance challenge with creek crossings, single track trails, aid stations, bag check, bike valet, and reusable cup provision.

A trail running event in October at Hahamongna Watershed Park offering 5K, 10K and a hilly half marathon across mixed single track and fire roads.

A themed charity run and community festival on October 18, 2026 in Downtown Roseville, CA, supporting the bleeding disorders community. The day includes a timed 5K, a one mile walk, festival food, carnival games, and a remembrance ceremony.

Coastal Half Moon Bay race day with half marathon, 10K, 5K, kids and virtual options supporting Senior Coastsiders.

Weekend at Burney in Burney, CA runs October 22 to 24 and features 48 hour, 24 hour, 12 hour formats plus 13.8 mile and 4.8 mile races. All races are cupless and free registration is available for Indigenous runners.

An endurance event at Beals Point, Granite Bay featuring hourly 4.16 mile laps until one runner remains, plus a 12 hour Mini Last Person Standing option. Aid is available at the start area and runners may set personal aid stations.