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!
July 2027
A 135-mile invitational ultramarathon from Badwater Basin to Whitney Portal with a 45-hour limit, major elevation gain, and mandatory support crews.
Seven Tuesday evening fun runs in Redding from July 20 to August 31, 2027, with paired short and longer distances and a $30 punch card covering all seven events.
A multi-distance trail event in the Sierra Buttes area featuring a summit VK plus 25K, 50K, and 100K routes with stocked aid stations.
A 24 hour loop event at Montgomery Waller Park in San Diego on July 23, 2027, featuring a 1.22 mile mixed surface loop with multiple timed race options and on course aid.
Trail races of 50K, 30K and 15K on the Harding Truck Trail near Modjeska Canyon with aid stations and required shuttle service.
July 24, 2027 at Lake Chabot Marina features 5K, 10K, half marathon, virtual 13.1 and a Half Marathon Hiker, with registration dates and published fees per event.
Experience a 2-mile coastal run at Hermosa Beach featuring a challenging mix of soft and hard-packed sand as part of the International Surf Festival.
August 2027
Trail 50K and half marathon around Lake Chabot Marina in Castro Valley, CA, with finisher shirt, socks, medal, and volunteer-supported aid stations.
Mountain road and trail races at Green Valley Lake offering 5K, 10K and half marathon courses with aid stations, chip timing, and post-race community activities.
Alpine trail event near Lake Tahoe with 5.6M, 10.5M, 21M and a three-loop 50K that covers roughly 7,500 feet of elevation gain.
Scenic open course 5K and 10K runs around Lake Gregory in Crestline at about 4,720 feet elevation, with RFID timing and finisher medals.
Trail races at Redwood Regional Park near Chabot Space & Science Center offering distances from a 50 yards kids dash to 50K with measured course distances.
A community running event in Felton, California with a 10K through Henry Cowell Redwoods and a one mile kids race plus a pancake breakfast.
A 13.7 mile out and back on the Dipsea Trail from Stinson Beach to Mill Valley with handicapped starts and annually adjusted wave assignments.
25k and 50k trail races in the Santa Monica Mountains at Malibu Creek State Park on August 15, 2026, with chip timing and a cash prize purse.
Trail 5K and 10K at Granite Beach on August 22, 2027, open to runners, walkers, and their dogs with medals for finishers and bandanas for dogs.
NorCal Spartan weekend at Mahon Ranch near Elk Grove features a Sprint 5 km with 20 obstacles and a Super 10 km with 25 obstacles.
Trail races around Jenkinson Lake starting at Scales Parking Lot with distances from 5K to 50K, marked single track, aid stations, and basic trail facilities.
September 2027
Trail races from 5K to 50K at Almaden Quicksilver Park on mixed dirt and single track with repeated aid stations and substantial elevation gain.