Trail Running Calendar California 2026-2027

Kick off the trail running season with the Dirty Secret Trail Run in Cool, California. Choose from a 10.3 or 5.8 mile course featuring single-track trails, meadows, and a creek crossing. Finish with a strawberry pancake breakfast and a cust..

Challenge yourself on the scenic trails of Crystal Cove State Park. Choose from 5K, 25K, or 50K distances with hill climbs and ocean views. Your run supports the John Wayne Cancer Foundation's fight against cancer.

Celebrate the 24th year of this community event in Los Altos Hills. Run or walk through the Westwind Community Barn and Byrne Preserve on hilly 5K, 10K, or 1 mile courses.

This trail run takes place at the scenic Sly Park Recreation Area near Jenkinson Lake. Runners can choose from seven different distances, from a 5K to a 50K. The course is marked with ribbons and signs, and all finishers get a medal.

Trailquake 2026 invites runners to the forested trails of Saratoga, California. Choose from a 5K, 10K, or half marathon course beneath the redwoods and pines. The event is scheduled for a Sunday in May.

Celebrate Mother's Day on May 10th with a family-friendly run or walk. The event, held at Pinto Lake County Park, features a 1K kids run, 5K, and 10K. Your participation benefits Pajaro Valley Shelter Services.

Trail runs at Skyline Wilderness Park in Napa with 50K, 30K, 21K and 10K options. Routes include steep Rim Rock climbs, summit views, cupless aid stations, and on-course water-only sections for longer distances.

Run for Amma is a 15th-anniversary charity trail run supporting cancer research at UCSF. The event features 50K, 30K, and 10K distances through Skyline Ridge Open Space Preserve. All registration proceeds go directly to fund cutting-edge ca..

The inaugural Rim Rock 50 Mile Trail Challenge explores Napa's wild trails. Runners will tackle a two-loop course through Skyline Park and the new Suscol Headwaters. This cupless event offers a 50-mile solo or relay option with a 13-hour cu..

Experience an endurance event in Los Olivos offering trail distances from 10 miles to 100 miles plus multi day options. This California Central Coast extravaganza meets the standards of the American Trail Running Association.

The O'Neill Park Trail Races offer a range of distances on the trails in South Orange County. Join the event in Trabuco Canyon on May 16, 2026.

Course and Terrain The Bishop High Sierra Ultras takes place in the scenic foothills of the Eastern Sierra Nevada mountains. The courses are mainly on four-wheel-drive dirt roads, with some sections of single-track trail and very short pave..

The Wildcat 2026 offers a Half Marathon, 10K, and 5K with spectacular Bay Area views. The event supports the East Bay Regional Parks Campership Program and takes place in El Sobrante, California.

Wild Rose Half Marathon & 5K The Wild Rose Half Marathon & 5K takes place in Roseville, California. The event starts and finishes at the Moksa Barrel House on Foothills Boulevard. The event offers three distances: Half Marathon: Th..

Run along the iconic LA River Path in Canoga Park with a fun, 80s martial arts theme. Choose from a 5K, 10K, or half marathon, or join virtually. Expect themed music, costumes, and a finisher's medal.

Trails around Corral Canyon Campground in Campo, California, offer 5, 9, 14 mile and 50K options on rocky, sandy and dirt routes with marked trails, on-course aid stations, and a first come, first served dry campground at the start.

This 10 km trail run takes place in Big Bear, California, featuring scenic but technical mountain trails at high altitude. It is scheduled for May 17, 2026, and is part of a Spartan festival weekend.

Nanny Goat is a family-friendly timed run on a flat, one-mile loop at a private horse ranch in Riverside. Choose from solo 3 to 24 hour races, a 100 miler, or a 24 hour relay. The event offers free camping, swimming, and a medal for every p..

This unique 8-mile race climbs 4,600 feet up a historic 19th-century mining road to the Cerro Gordo ghost town. At the summit, a celebration with BBQ and music awaits before a shuttle ride back down. All finishers receive a shirt and medal,..

Experience the final 70 miles of the Western States trail during this three day training event featuring supported runs of 19, 20, and 32 miles through iconic canyon terrain and mountain climbs.