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
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.
Trail-running event in Griffith Park, Hollywood offering distances from 10K to 50 Mile on singletrack and fire road with detailed course maps and elevation.
Trail races on March 27, 2027 in Burney, CA offering 50K, 30K and 10K out and back courses with a 12 hour cutoff and stocked aid stations.
Trail races at Falcon Crest Parking Lot, El Dorado Hills on March 27, 2027 offering 5K, 10K, 8 mile and half marathon on dirt single-track trails with rolling hills.
April 2027
Trail race at Santa Teresa County Park on April 3, 2027 offering 5K, 10K, 10 mile and half marathon on marked, hilly trails.
Two-day Spartan Trifecta Weekend at Modesto Reservoir Regional Park on Apr 3 and 4, 2027 featuring 5K, 10K, 21K, 50K obstacle races plus kids events.
Trail runs and gravel bike routes around Diamond Valley Lake in Hemet, CA on April 3–4, 2027, with distances from 1 mile to marathon plus youth and stroller options.
Trail running event in Walnut Creek on April 3, 2027 offering 50K, Half Marathon, 10K and 5K with a portion of entry fees benefiting Save Mount Diablo.
Trail running event from Folsom Point Boat Ramp to Auburn on April 3, 2027, with 50, 25 and 10 mile options plus on-course support and finisher awards.
A martial arts themed set of races on April 3, 2027 in Canoga Park, CA offering 5K, 10K, a 13.1 mile half, and a virtual option.