Trail Running calendar near San Ramon 2026-2027

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 two day Spartan obstacle race weekend at Modesto Reservoir Regional Park offering Sprint, Super, Beast and Ultra distances plus a kids race and spectator access.

A trail running event in Walnut Creek on April 3, 2027 offering 50K, half marathon, 10K, 5K and a remote option. Part of entry fees support Save Mount Diablo and its land conservation work.

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 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 on May 15, 2027, offering 10K to 50K courses with substantial climbing, spaced aid stations, a cupless policy, and new trails through Napa Open Space.

A Napa Valley trail ultramarathon using Skyline Wilderness Park and Suscol Headwaters trails, offered as a solo ~50-mile challenge and a one-loop ~25-mile option, with cupless aid stations, drop bags, and specific crew and pacer rules.

A 5K mud and obstacle run at Mahon Ranch in Elk Grove on May 16, 2027, with adult and KIDZ family waves, required signed waivers and photo ID for adults, spectator festival access, and on-site event photography.

Run for Amma is a charity trail event at Skyline Ridge Open Space Preserve in Los Gatos offering 50K, 30K and 10K courses, with all registration proceeds donated to a UCSF cancer research lab.

A weekend of Spartan obstacle races at Toro Park near Salinas with Sprint, Super and kids distances on wooded, hilly trails. Team entries, volunteer options, spectator access, and a service member discount are available.

Trail races of 10K, half marathon, and marathon at Toro Park, Salinas on May 30, 2027, over rocky trails and dirt roads with summer temperatures around 16ºC and an average altitude of 520 meters.