California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 389 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
March 2027
A coastal and mountain trail ultramarathon in Marin County offering 50M and 50K routes with technical single-track, fire roads, and significant elevation gain.
Family friendly 5K mud run at Lake Elsinore Diamond Stadium on March 13, 2027 with mud pits, obstacles, slides and a Pre Party.
Experience the rugged beauty of the Sierra Nevada foothills on this 50K out and back course featuring 6,500 feet of elevation gain along the historic Western States Trail.
Three day trail race in Marin County offering 28K, 50K and a point to point 100K with marked courses, aid stations, shuttle service and extensive race support.
Timed 6-, 12-, and 24-hour running events at Lake Cuyamaca on a scenic 2 mile loop near Julian, CA, with on-site dining, a store, and camping and RV options.
A multi-distance trail running event at Calero County Park on March 13, 2027, featuring single track trails, multiple aid stations, and options from a kids run to a 50K.
A waterfront running festival in Long Beach on March 20, 2027 featuring races from 5k to a half marathon, a beer mile with four included beers and a nonprofit beer tasting alongside a one mile Beer Stroll.
Tough Mudder Lake Elsinore on March 20, 2027 offers 5–15+ km obstacle courses at Lake Elsinore Raceway, plus Infinity laps, spectator village, and finisher rewards.
Multiple trail distances run through Redwood Regional Park on March 20, 2027 at Chabot Space & Science Center. Routes use East Ridge, West Ridge, Stream and Bridle trails and distances were measured with a Rolatape surveyor's wheel.
Trail running event in Valencia California on 03/20/2027 offering 10K, Half Marathon, and 50K Ultra across hills, ridgelines, and canyon terrain with views of the Santa Clarita Valley.
A Half Marathon and 10K in Pioneertown, CA with high desert and Sawtooth Mountain views, chip timing, podium prizes, and proceeds supporting the John Wayne Cancer Foundation.
Tough Mudder at Lake Elsinore Raceway on March 20, 2027 offers 15 kilometers, 5 to 8 kilometers, Infinity laps, 20+ obstacles and finisher rewards.
A trail event at Granite Beach offering 5K and 10K courses plus a Mighty Mile for senior dogs, with divisions by dog size and Cani Cross, single aid station, finisher medals, and awards for multiple categories.
Two days of trail runs and road and river bike rides at Griffith Park supporting Streets Are For Everyone's road safety work, with distances from 1K and family rides up to a half marathon and 100 mile ride, based at the Autry Museum.
Test your endurance at this low key 12 hour run featuring a 1 mile singletrack loop on private property in Joshua Tree.
Trail marathon, half marathon, 10K and 5K on the single track at Bothe Napa Valley State Park on March 20, 2027 with a 300 runner limit.
An hourly backyard ultra on Dry Creek Parkway near Sacramento where runners repeat a 4.16 mile loop until only one completes the most yards. Each loop must be finished within the hour and the last runner to complete a loop wins.
A trail and road running event at Quarry Lakes Regional Recreation Area offering Half Marathon, 10K, 5K and a remote runner option on March 27, 2027.
Coast to Crest in Del Mar offers 5K and 10K out and back trail races on mostly flat hard packed dirt with lagoon views and a downhill finish.
Trail races of 5K, 10K, half marathon and 35K on the Western States trail near Auburn, CA, featuring steep climbs, technical single track, cupless aid stations, and chip timing.