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!
April 2027
Leona Divide 50/50 in Lake Hughes, CA features trail races from 30K to 100 miles on well marked singletrack and fire roads with substantial elevation gain.
Badger Cove is a running event in Livermore, CA on April 17, 2027 offering a half marathon, 10K, 5K and a hiker division. Registration opens January 1 and closes February 2 with fees varying by event.
Trail race on April 17, 2027 featuring a hilly half marathon plus 10K and 5K through Spring Lake Park and Annadel State Park.
Trail races at Jack London State Historic Park featuring a half marathon, 5.5 mile and 5K through vineyards and Sonoma Mountain hills.
Trail races from a kids run to a half marathon inside Marshall Gold Discovery State Historic Park, featuring singletrack, switchbacks, aid stations, and significant elevation gain.
A trail 5K at BackCountry Gardens with two 1.5 mile loops, natural obstacles, an after-race Beer Mile for 21+ and a post-event wine tasting.
A 5K mud and obstacle run at Club Moto in Livermore on April 17, 2027 with required signed waiver, a spectator fee, and listed entry prices.
Trail races on April 17, 2027 through Huddart Park and Purisima Creek Redwoods with 10K, half, 35K, and 50K options, cupless and chip-timed.
Viansa Wine Run 5K in Sonoma on April 18, 2027 is a chip timed 5K at Viansa Winery with a race shirt, collapsible wine glass, finisher medal and a pour of wine.
Trail races from 25 km to 100 miles around Auburn, California on sections of the Western States Trail with UTMB and Western States qualifying status.
Trail races at Skyline Ridge Open Space on April 24, 2027, offering distances from a 50 yard kids dash to a 50K with ocean and mountain views.
No Foolin' Foot Race in San Carlos on April 24, 2027 offers 15K, 10K, 5K and a 1K kids trail course across Big Canyon, Eaton and Pulgas Ridge, with proceeds supporting local open space trail maintenance.
Timed 3, 6 and 12 hour running and walking event on a scenic 2 mile loop through Southern California's coastal redwood grove at Carbon Canyon Regional Park.
Scenic coastal ridge trail race on Mt Tamalpais offering Half Marathon and 10K courses with limited 300 entries and a three hour course cutoff.
Multiple trail distances at Almaden Quicksilver Park with marked courses, aid stations, drop bag service, and substantial elevation gain across short and ultra distances.
Looped trail races at Lake Perris offering 100k, 50k, and 10k courses with significant elevation, aid stations, group camping, and AC100 qualifying spots.
Six-hour trail challenge where runners complete a 5K each hour; finish all six laps to earn the OUTLAST medal and a spot on the world leaderboard.
Annual 5K obstacle run at Hobb's Grove in Sanger, CA on April 25, 2027, with adult and KIDZ family waves; signed waiver required and spectators admitted for a fee.
Aut2Run for Autism in Camarillo on April 25, 2027 offers multiple distances, a Fun K for children, and a virtual run option.