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!
April 2027
Obstacle course weekend at Pala Fox Raceway with Sprint 5 km, Super 10 km, kids races, spectator options and on-site festival.
Oriflamme 50K on April 10 2027 is an out and back trail race that drops from the Pacific Crest Trail into desert canyons before a long climb back. The event is limited to 150 runners and features stocked aid stations and finisher medals.
Trail races at Noli Indian School on the Soboba Indian Reservation featuring marathon, half marathon, 5k and a kids 3k with Native and Open divisions.
A multi-distance running event in Agoura Hills with half marathon, 10K, 5K, 1 mile and multi-race challenges, held around the Santa Monica Mountains with a large post race party.
A pack burro race and trail run in the Mojave Desert each second Saturday of April, offering four distances for runner-and-burro teams or runners without burros, and fundraising for local donkey rescue and charity organizations.
An overnight lap race in Reedley, California, held around the full moon. Options range from 12K and timed 6, 12, and 24 hour categories to 100 miles, plus 2 to 4 person relays, camping, and full aid station support.
A women only 10K trail loop in Auburn with aid stations, age group awards, packet pickup the day before, and travel prizes to Spain awarded by placement and random draw.
A trail event at Skyline Ridge Open Space Preserve offering distances from a 50 yard kids dash to a 50K race. Routes run largely on the Bay Area Ridge Trail with ocean and Santa Cruz Mountains views.
A 50K trail ultramarathon on the Mendocino Coast featuring river, ocean, redwoods and a waterfall, with the listed start at Big River State Beach.
Multi distance trail event in Lake Hughes, CA on April 17, 2027, including a 100 mile race and Western States qualifying distances.
Outlands is a two day endurance event in Pilot Hill, California on April 17 and 18 2027, featuring 25K, 50K and 50M trail runs plus a 50K mountain bike course over single track and double wide trails.
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 fundraiser on April 17, 2027 offering a Half Marathon, 10K and 5K with a hilly technical half and a cup free policy.
Auburn trail races from 25 km to 100 miles that share sections of the Western States Trail and qualify runners for UTMB World Series and Western States.
A trail event at Lake Chabot Regional Park offering distances from a 50‑yard kids dash to a 50K ultramarathon. The looped course circles the Lake Chabot reservoir and surrounding hills with measured distances.
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.
A 5K mud obstacle run at Hobb's Grove in Sanger CA on April 25 2027 with Adult and KIDZ Family waves; waivers and photo ID required for adults.
Multi-distance trail event in Ojai, CA with 100 mile and shorter races on Los Padres National Forest trails, limited to 150 entries and specific qualification rules.
A 100-mile trail endurance race in the Mount Laguna area using Pacific Crest, Noble Canyon and Lake Cuyamaca trails. The event is a Western States qualifier, is cupless, and requires volunteer hours or a TrailFit donation.
Inaugural Harvest & Howitzer Backyard Ultra is a last runner standing event on a 4.167 mile loop at a private 100 acre farm in the Sierra foothills, Apr 30 to May 2, 2027.