Trail Running calendar near Napa 2026-2027

Western Pacific 2027 at Quarry Lakes Regional Recreation Area in Fremont offers Half Marathon, 10K and 5K races on a mostly flat course along the historic Western Pacific Trail. A remote runner option is also available.

A spring trail race at Pueblo Day Use Area in Santa Teresa County Park on April 5, 2025 offering 5K, 10K, 10 Mile and a half marathon across marked, hilly trails with aid stations and a four hour half marathon limit.

A weekend obstacle course event at Stanislaus County Parks offering multiple races from a kids run to a 50 km ultra, with technical trail sections and signature obstacles across grasslands and hills.

A trail running event at Mount Diablo on April 3, 2027 offering 50K, half marathon, 10K and 5K options; registration includes a remote-runner option and BBQ ticket. Part of the entry fees support Save Mount Diablo's land preservation.

A women's only 10K in Auburn on April 17, 2027 that follows scenic trail loops with aid stations and age-group awards; the overall winner and four additional finishers will be selected to receive all-expenses-paid trips to a women's running..

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.

Trail races around Auburn, California include 100M, 100K, 50K and 25K on sections of the Western States Trail. The 100K awards Golden Tickets to Western States and the event qualifies for UTMB World Series Finals.

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 timed half marathon through eight Napa Valley wine estates finishing in Yountville. The event includes a finish line Wine Village with live music and complimentary wine tastings.

Trail runs at Skyline Wilderness Park near Napa feature four distances from about 6 to 32 miles with significant elevation. The cupless courses include spaced aid stations, a long water only stretch on the longer routes, and on site parking..

A trail ultramarathon at Skyline Wilderness Park on May 15, 2027, featuring a solo ~51-mile 2.5-loop course and a one-loop ~25-mile option. Cupless aid stations, specified crew and pacer rules, drop bag service, on-course nutrition, and pos..

A charity trail event at Skyline Ridge Open Space Preserve in Los Gatos offering 50K, 30K and 10K courses, with 100% of registration proceeds donated to a UCSF cancer research lab.