California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 380 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
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 event on March 22, 2025 at Calero County Park in San Jose offering runs from a kids race to a 50K, single track and dirt-road courses, multiple aid stations, and per-distance time limits.
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.
Obstacle event at Lake Elsinore Raceway on March 20, 2027 with 5 to 15+ km options, Infinity laps, 12+ to 20+ obstacles, and finisher medal, shirt, and headband.
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 chip timed Half Marathon and 10K in Pioneertown's high desert with scenic views, aid stations, finisher mug and shirt, benefiting the John Wayne Cancer Foundation.
A mud and obstacle event at Lake Elsinore Raceway on March 20, 2027 offering 15K and 5 to 8K courses, an Infinity multi lap option, spectator access and group packages, with finisher medal, shirt, headband and drink included.
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.
A 12-hour trail run in Joshua Tree on a one-mile singletrack across 20 acres, limited to 50 runners with aid station food, shoe demos, and awards for Ultr a finishers and top overall.
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 spring race at Quarry Lakes Regional Recreation Area in Fremont on March 27, 2027 offering half marathon, 10K, 5K and a remote runner option.
Flat coastal trail races in Del Mar offering 10K and 5K courses with lagoon views and a downhill finish on hard packed dirt.
Trail races in Auburn and Cool, CA with 5K, 10K, half marathon and 35K courses on the Western States trail, aid stations, and age-group awards.
April 2027
A spring trail race at Pueblo Day Use Area in Santa Teresa County Park on April 5, 2025 offering 5K, 10K, 10 Mile and a half marathon across marked, hilly trails with aid stations and a four hour half marathon limit.
Obstacle course weekend with races from 5 km to 50 km, held April 3 and 4 2027 at Modesto Reservoir Regional Park near Waterford CA.
Multi distance trail running and gravel bike events at Diamond Valley Lake in Hemet, California. Routes include lakeside loops, out and back courses, a stroller 5K and a kids fun run.
Trail event at Mount Diablo on April 3, 2027 offering 50K, half marathon (including a hiker option), 10K and 5K with proceeds benefiting Save Mount Diablo.
Trail running event on April 3, 2027 from Folsom to Auburn offering 50, 25 and 10 mile options with on course aid, timing, and finisher recognition.