California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 387 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
September 2026
Trail races at Sanborn County Park on Sep 27, 2026 through shaded redwood forest with steep climbs and flowy singletrack.
Timed in-person races and a virtual option in Auburn, California, with chip timing, finisher medals, t-shirts and a dedicated hiker division.
October 2026
A self guided 50K point to point on the original South Yuba Campground to Bear Valley course, completed any time during October 2026 with self reported results.
Timed trail event at Sand Creek Ranch in Los Olivos offering 3.4 mile loop options from 3 hours up to 48 hours, with on-course aid and free camping.
A loop ultra in Mammoth Lakes on October 2, 2026, circling an ancient caldera with alpine, volcanic and high desert terrain plus cash prizes for top finishers.
A three-day event in San Rafael featuring an Olympic triathlon, Olympic relay, trail half marathon, a combined challenge and a kids fun race.
Trail runs near Bear Valley and Lake Spaulding with a 50K and a 24 mile option. The 50K includes a summit loop with about 5,700 ft of gain, rocky sections on Signal Peak OHV Road, cupless aid stations, and finisher medals.
A 100 mile endurance trail race in the San Gabriel backcountry, scheduled October 3, 2026, using a lottery for entry and an out and back course from Loma Alta Park.
A 100 km trail race in Cuyamaca Rancho State Park through oak woodlands and pine forest, limited to 250 qualified entrants with live tracking and aid stations.
Cirque Series at Mt Baldy on 10/03/2026 is an inaugural trail race featuring a 9.1 miles course with 3,926 ft of vertical gain and separate competitive divisions.
Trail half marathon in Brisbane, California on October 3, 2026 with 2,400 ft elevation gain, summit views, aid stations and a cupless policy.
SEB Mud Run in Castaic on October 3, 2026 features a chip timed 4 mile mud obstacle and a 1 mile kids fun run with showers and changing tents on site.
Night trail race in the Yuha Desert near Ocotillo CA featuring 8 mile and 25K courses with a marked out and back route and two aid stations.
A 3 miles open race on the Sunset Conference cross country course at Huntington Beach Central Park on October 3, 2026, featuring electronic timing and age group medals.
21st Annual Garin Park XC Challenge at Garin Regional Park is a USATF Pacific Association cross country meet with about 5K courses featuring hills, scenic views, and a half mile flat finish.
Monthly community hike with an optional trail run in Richmond, CA, organized by FIERCE Advocates with Moving Forward and Richmond Run Club; free parking and open to all ages.
Run by the Sea at Wilder Ranch State Park on October 4, 2026 features a half marathon, 12K and 4K on mostly flat coastal bluff trails.
Trail races in South Lake Tahoe on October 4, 2026 featuring half marathon, 10K, 5K and a youth Tadpole Trot with aid stations and finisher awards.
A 5K on shaded eucalyptus horse trails at Ernie Howlett Park in Palos Verdes Peninsula on October 4, 2026. In person and virtual options are available, plus a fundraising route that waives the fee with at least $100 raised for Strides in Recovery.
Multiple race distances start and finish at Sam Lynn Ballpark in Bakersfield, featuring mixed terrain on paved and dirt trails and a notable climb on the half. Aid stations, race day services, post race refreshments and awards are provided.