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!
May 2027
A 5k through Whittier Narrows Park with tacos, beer for 21+, live mariachi and a post race festival; packet pickup occurs the day before and a 2 hour time limit applies.
A scenic trail event in Lone Pine, CA on May 1, 2027 offering 50-mile, 50K, marathon, and 10-mile options with ten aid stations.
A 62-mile trail ultramarathon in the Marin Headlands with over 11,000 feet of climb, staffed aid stations, sustainability practices, and a 400-runner field limit.
Memorial marathon in San Diego on May 8, 2027; a self supported, not officially timed event with a counter clockwise course that passes Torrey Pine North facilities.
Timed half marathon through Napa vineyards from Quintessa Winery to Yountville with winery aid stations, a Finish Line Wine Village, shuttle service, and a finisher medal.
A community trail run and hike on May 8, 2027 at the Point Arena and Stornetta Lands, co-hosted by ACORN and Pacific Community Charter School. Proceeds support the Students Protecting the Coast environmental education program.
A 13.1-mile course around Bass Lake in the Sierra National Forest, combining fire roads, a long paved downhill, lakeside miles, five cup-free aid stations, and a Recreation Point finish.
Trail races at Crystal Cove State Park on May 8, 2027 offering 50K, 25K and 5K courses with ocean views; proceeds support John Wayne Cancer Foundation.
A multi-distance trail event in Susanville on May 8, 2027 featuring 50K, 30K, half marathon, 4.5 mile, a relay option and a free kids mile.
Trail races from 50 yards to 50K around Lake Anza in Tilden Regional Park, Berkeley on May 8, 2027, with courses measured by a Rolatape wheel.
Trail runs from Stinson Beach up into Muir Woods with Marathon, Half Marathon and 7 Mile options, marked singletrack, several aid stations, and a 6.5 hour course cut-off.
Trailquake in Saratoga on Mother's Day offers 5K, 10K, a half marathon and a hiker division on redwood and pine forest trails. Finishers receive custom medals and shirt options.
Community run and walk at Pinto Lake County Park on May 9, 2027, offering 1k, 5k, and 10k distances to benefit Pajaro Valley Shelter Services.
Experience a multi day trail running festival in Los Olivos featuring distances from 10 miles to 200 miles on a scenic ranch course with onsite camping and a community atmosphere.
High-altitude Spartan weekend at Big Bear Mountain Resort with Sprint, Super, Beast and kids obstacle races plus a Trifecta option.
Experience the rugged beauty of Skyline Wilderness Park with trail races ranging from a 10K to a demanding 50K ultra marathon featuring expansive Napa Valley views.
Trail races at O'Neill Regional Park in Trabuco Canyon on May 15, 2027 offering distances from 10K to 50K over shaded singletrack and fire roads.
The Rim Rock 50 Mile Trail Challenge offers 50-mile and 25-mile races through the rugged ridgelines and oak woodlands of Skyline Wilderness Park in Napa Valley.
A race day in El Sobrante with a half marathon, 10K, 5K and a hiker division through the hills of Wilcat Canyon; registration windows and fees vary by distance.
Scenic Trail 10K at Big Bear Mountain Resort with high altitude pine singletrack, technical climbs and wide views of the Southern Sierra.