California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 370 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
September 2027
Mount Baldy Run to the Top is a 7+ mile trail race in the Angeles National Forest finishing at 10,064 feet with aid stations, timing, and community-directed proceeds.
A weekend trail festival in Mendocino Woodlands Park with a half-marathon, 10K and 6- and 12-hour timed formats, camping, meals, and on-course aid in an ancient redwood setting.
A day of running and beer tasting at Bishop Ranch on September 11, 2027, featuring a half marathon, shorter races, a beer mile, and an afternoon Shindig.
Trail ultra at Mt. Wilson in the Angeles National Forest offering 25K and 50K courses on technical single track with major elevation gain and fully stocked aid stations.
A 68-mile trail ultra across the Backbone Trail in the Santa Monica Mountains with about 13,600 feet of climb, solo and 2 to 4 person relay options, capped at 200 runners.
Trail runs of 10 miles and 5K at Granite Beach, Folsom Lake SRA, featuring new 2027 courses, aid stations, post-race beer and a custom race hat.
Multisport race at Crystal Cove State Park offering Sprint and Olympic triathlons, duathlons, aquabikes, relay options, and a 5K beach and trail run in Orange County, CA.
A looped trail event in Auburn featuring timed runs from 3 to 72 hours plus a 100 mile race, with stocked aid stations, crew amenities, on-site massage, and crew lounge.
Experience rugged trails and mud at Lake Elsinore Raceway with Spartan 5K, 10K, and Kids obstacle races set against Southern California’s largest natural freshwater lake.
A September trail event at Lake Chabot offering Marathon, 50 Mile and 100K courses with UTMB qualification and a Bay Area 100 pathway.
Trail races through shaded redwood forest at Sanborn County Park with steep climbs, fast descents and three distances 50K, half marathon and 10K.
October 2027
A 100 mile loop race through the San Gabriel Mountains with an added 100K held on the same day.
A 100K trail race in Cuyamaca Rancho State Park near Julian CA featuring three distinct loops and serving as a 2028 Western States qualifier.
Trail races in Auburn on October 10, 2026 featuring 50K, half marathon, and 5M courses along the American River Canyon with live music and free cider.
A two-day trail festival in Big Bear Lake with five race distances, varied mountain and desert terrain, and a downtown start and finish.
A multi distance endurance event at Lake Merced in San Francisco on a 4.475 mile loop with USATF certified 50K and 50M courses.
Trail race at Solana Ranch Park in Carmel Valley offering 10 Mile, 10K and 5K courses on dirt trails with a notable climb called Puke Hill.
A multi-distance trail event at Almaden Quicksilver Park with marked out-and-back courses, aid stations, toilets, summit sections to Bald Mountain and Mt Umunhum, and varied time limits.
A two-day mountain event near Lake Isabella CA with multi-stage all-mountain MTB racing, a charity 5K trail run, a kids race, on-site camping and awards.
Trail running at Lake Hodges on October 16, 2027 with distances from 1 mile to 50K, youth categories, and a cupless aid station policy.