California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 365 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
November 2026
Trail races at Santa Margarita Ranch on November 8, 2026, offering 10K, half marathon and 50K over rolling, hilly soft surface trails.
A Griffith Park 5K run and walk hosted by the Sandy Rollman Ovarian Cancer Foundation to raise funds and awareness for ovarian cancer research.
Community running event in Ross, CA on November 8, 2026 with a Toddler Dash, 1 mile, 5K and 10K plus post-race festivities and finisher medals.
Second Annual Running For Warriors in Clovis features in-person 5K and 2 mile races plus a virtual 5K, organized by a nonprofit supporting veteran-focused causes.
Trail races at Rancho San Fernando Rey in the Santa Ynez Valley feature 51 KM and 25 KM courses through mountains, vineyards, oak trees and views of Loma Alta and Cachuma Lake.
A multi-distance running event on the Cahuilla Indian Reservation in Anza, CA, featuring a 2-mile loop, camping, aid stations with hot food, and a 100-mile buckle.
A second annual trail run along the empty Kaweah Lake Bottom in Three Rivers, California with 5K and 10K options, race amenities, and proceeds supporting St. Anthony Retreat Center.
Trail half marathon and 10K in Avalon on Catalina Island with ocean summit views, historic landmarks, and additional kids and challenge events.
A 4K pet division and a 5K human-only race in Griffith Park on 11/14/2026, with proceeds supporting the Run for Paws nonprofit.
Fixed-time trail runs at O'Neill Regional Park on a roughly 2.75-mile wooded loop with 8, 6, and 3 hour options and a central aid station.
Experience a flat and fast trail race through the scenic Quarry Lakes Regional Recreation Area in Fremont. Choose from a USATF certified half marathon, 10K, or 5K while enjoying views along the Alameda Creek Trail.
Map-based trail scramble in Harvey West Park on Nov 14, 2026 where teams of 1 to 5 collect points in 2 hour or 4 hour formats.
Trail event in Yucaipa, CA on Nov 14, 2026 offering 21, 10 and 4 mile courses, with 10% of fees donated to the Crafton Hills Open Space Conservancy.
A backyard ultra on November 14, 2026 in San Diego with a smooth hard packed loop, a single gentle hill, dog friendly policies, and car camping; registration closes Nov 1.
Trailsgiving at Elysian Park features 5K, 10K, 15K and half marathon trail loops with finisher medals, live results and free photos on November 14, 2026.
A community trail event in Ripon, CA offering 5K, 10K and a 13.1 mile half marathon with shirts, medals, and age group awards.
Trail runs in Auburn, CA on November 14, 2026 offering 5K, 10K, 13.4 mile and 50K routes with aid stations, an event shirt, and proceeds to Auburn Trails Alliance.
A 3.01 mile summit course on Mount Konocti in Lake County, California, gaining 1,625 ft to a Wright Peak finish.
November 14, 2026 Veterans Day at McKay in Eureka offers 5K and 10K walk and run options, kids races, a community fair, and local food and sponsors.
Trail cross country races of 1K, 3K and 5K at SLO Ranch and City Farm in San Luis Obispo with prizes and participant SWAG.