Trail Running Calendar California 2026-2027

Test your endurance at Almaden Quicksilver County Park with 50 km or 100 km trail races. These USATF sanctioned events offer significant elevation gain and the 100 km distance serves as a Western States 100 qualifier.

A 13.1-mile point-to-point half marathon on May 9, 2026 through Napa Valley vineyard roads, finishing in Yountville with a Wine Village featuring local wine, food, music, and winery-hosted aid stations.

A spring trail race in Cool, California with two single-track distances of 5.8 and 10.3 miles, varied terrain and a creek crossing. The event is limited to 600 participants and includes packet pickup, a tech shirt, and a finisher medal.

Experience the scenic trails of Crystal Cove State Park in this coastal run featuring 50K, 25K, and 5K distances to support the John Wayne Cancer Foundation.

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.

Trail Run at Sly Park in Pollock Pines offers multiple trail distances around Jenkinson Lake through pine forest and equestrian routes, with marked courses, aid stations, and commemorative medals for finishers.

Experience the lush redwood landscapes of Saratoga at Trailquake 2026. Choose between 5K, 10K, or half marathon distances on forested trails with options to run, walk, or join remotely.

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.

Experience high altitude obstacle racing at Big Bear Mountain Resort featuring steep climbs and over 1200 feet of descent. Conquer the Sprint, Super, or Beast distances to earn your Trifecta qualification in the San Bernardino National Fore..

Multiple trail distances through Skyline Wilderness Park in Napa, featuring Rim Rock climbs and valley views, touchless aid stations, and a cupless policy that requires runners to carry their own hydration.

A charity trail event at Skyline Ridge Open Space Preserve offering 50K, 30K and 10K distances. All registration proceeds go to the UCSF Julia Carnevale Lab for cancer research.

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 the Born To Run Ultra Marathon Extravaganza in Los Olivos, California. Choose from multiple trail distances or multi day endurance challenges on the scenic California Central Coast.

Trail races at O'Neill Park in Trabuco Canyon offer five distances from 10k to 50k. Registration closes May 1 and entries are non refundable but may be rolled over if cancellation is due to weather or fire.

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..

Experience 360 degree views of the Bay Area at Wildcat 2026 in El Sobrante. This scenic event features a Half Marathon, 10K, and 5K as well as a remote participation option.

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.

Experience a technical trail event in the Cleveland National Forest featuring rocky scrambles and OHV trails. Choose from four distances ranging from a 5 miler to a 50 km ultra through diverse California terrain.

A point to point half marathon on May 17, 2025, descending from Mt Umunhum to the Hacienda Entrance in Almaden Quicksilver County Park. The route is about 13.4 miles with aid stations, toilet facilities, marked trails, and a 5.5 hour time l..