California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 389 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
A hilly loop race around Angel Island offering a Half Marathon and 10K, limited to 400 participants with ferry access from Tiburon and a 3.5 hour course cutoff.
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.
Trail running event in Lake Hughes, CA offering distances from 30K to 100 miles on well marked singletrack and fire road across high desert divide terrain.
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.
Annadel trail event on April 17, 2027 featuring a half marathon, 10K and 5K with over 1,500 feet of elevation gain and a cup free policy.
Trail races at Jack London State Historic Park on April 17, 2027, offering a half marathon, 5.5 mile and 5K across vineyard views and Sonoma Mountain slopes.
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.
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.
Timed 3, 6, and 12 hour running and walking events through Southern California's only coastal redwood grove at Carbon Canyon Regional Park.
Trail races at Mt Tamalpais State Park on April 24, 2027 offering Half Marathon and 10K courses on coastal ridge single-track with ocean and lagoon views.
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.
Experience the rugged beauty of Ojai at Coyote Two Moon, featuring a range of trail distances from 10K to a 100 miler with significant elevation in the Los Padres National Forest.
Experience a technical 100 mile mountain course through San Diego's east county mountains featuring 15,600 feet of elevation gain and a 32 hour time limit.
Test your endurance at this inaugural last runner standing event held on a private 100 acre farm in the scenic Sierra foothills of California.