California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 363 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
October 2026
In-person and virtual 5K in Los Angeles on Oct 25, 2026 supporting dyslexia education, with a flat dirt trail, race bibs, refreshments, and free parking.
A team relay across San Francisco trails covering nearly 13 miles and over 2,000 feet of elevation, with five segments and teams of up to five runners for a $50 entry.
A trail run by Bay Area Run Crew at Stevens Creek Reservoir featuring varied terrain, trail-ready gear recommendations, and a post-run social at Voyager Craft Coffee.
A multi distance trail event at Lake Perris, CA featuring a 200 mile course with 44,000 feet of elevation and timed cutoffs.
Introductory trail run and walk at Fort Ord National Monument with a 6.5 mile loop, a 2 to 3 mile family friendly walk, on site snacks and post event burritos.
Trail races at Caspers Wilderness Park near San Juan Capistrano offering 10K, half, 35K, marathon and 50K on well marked singletrack and fire roads.
Experience a unique map adventure through the decorated streets of East Sacramento. Choose a 5k or 10k course and solve checkpoint challenges solo or in a team of up to five people.
A 3.6 mile trail loop at Coastal Peak Park with about 585 ft gain per loop through coastal sage scrub and riparian canyons; part of the Southern California UltraRunner Grand Prix Series.
Trail races in Almaden Quicksilver Park from 5K to 50K over hilly dirt roads and single-track, with two staffed aid stations, drop-bag service for longer distances, and a finisher medal for all participants.
A brand new Halloween morning trail 5K at Pelona Vista in Palmdale that climbs the local big hill, with a costume friendly club atmosphere and $25 registration.
Score-O orienteering across the UC San Diego campus with a 1:5000 map, electronic punching, a one hour time limit, and a 100 participant entry limit.
An in-person 5K and 10K on the Lake Hodges trail at Rancho Bernardo Community Park supporting veterans' mental wellness, family friendly with Halloween costumes encouraged.
November 2026
A fundraiser in Joaquin Miller Park featuring a 5 km trail race and a 1 mile fun run to support Oakland Tech PTSA and student programs.
Trail marathon on November 1, 2026 at Red Tailed Roost Trailhead in Mount Laguna; registration opens August 8, 2026 on UltraSignup.
A 6.45 mile trail race in Annadel State Park held as the 40th annual event with staggered starts, awards for the top 13, and limited registration to 100 runners.
Three days of orienteering in Fresno with three new maps, best two of three races score, regional club scoring options, camping and variable registration pricing.
Two mornings at Runyon Canyon Park with free registration and 5K and 10K route options on November 6 and 7, 2026.
Trail race in Silverado CA rerouted to Black Star Canyon on Nov 7, 2026, with a new 25k and multiple aid stations.
A 13.1 mile night race through Mojave Desert terrain near Joshua Tree with sandy trails, required headlamp, a 4 hour cutoff, and start and finish at RESET Hotel.
A trail event near Folsom Lake offering 100 miles and 50K routes with varied terrain, staffed aid stations, cupless policy, and pacer restrictions.