Trail Running calendar near Fairfield 2026-2027

A timed half marathon on 9 May 2026 from Quintessa Winery to Yountville in Napa Valley. The finish line Wine Village features live music, Domaine Chandon welcome bubbles and complimentary tastings from multiple wineries.

A spring trail race in Cool, California on May 9, 2026, with 5.8 and 10.3 mile single-track courses featuring meadows, hills, a creek crossing, and a tough climb; limited to 600 runners and entries are non-refundable.

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.

Trailquake is a trail race in Saratoga, California on May 10, 2026 offering 5K, 10K and a half marathon through redwoods and pines. Hikers and walkers are welcome and the half marathon is part of the Brazen Ultra Half Series.

Trail races at Skyline Wilderness Park near Napa offering 50K, 30K, 21K and 10K on routes with Rim Rock climbs and wide valley views. Aid stations are touchless and the event is cupless so runners must bring their own cup or bottle.

A charity trail event at Skyline Ridge Open Space Preserve offering 50K, 30K and 10K options, with elevation profiles and route maps provided; all registration proceeds support UCSF 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..

A trail race at Wildcat Canyon Regional Park near El Sobrante offering a half marathon, 10K and 5K with Bay Area views. Chip timing and custom finisher medals and shirts are provided.

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..

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..

Mud Factor Sacramento is a 5K mud and obstacle run at the 300 acre Mahon Ranch in Elk Grove on May 17, 2026. The event includes adult and KIDZ family waves, a festival area with paid spectator access, and required signed waivers.

A trail race at China Camp State Park in San Rafael offering 5K, 10K, and half marathon courses with scenic single track, limited to 275 entrants and staffed aid stations. Registration deadlines determine shirt guarantee and refund credit r..

A trail event on the El Dorado Trail in Placerville on May 23, 2026, offering distances from a kids run to a half marathon, paved and unpaved sections, aid stations, color-coded course markings, and medals for finishers.

A trail running event at Point Pinole on May 30, 2026, offering a half marathon, 10K and 5K. The original Brazen Racing event welcomes runners and walkers and includes bib pickup, posted results, free photos and volunteer roles.

Experience a technical trail race through the redwood groves of Joaquin Miller and Redwood Regional parks. Choose from multiple distances ranging from an 8K to a 50K ultra marathon on accurately measured courses.

Experience a scenic run through Coyote Point Recreation Area with a 5K or 10K event supporting mental health. Enjoy a free community wellness fair featuring local health vendors and family friendly activities.

These trail runs explore the beautiful Sonoma Coast State Park. The courses traverse a scenic ridgeline with ocean views and summit Red Hill. The event will return in 2027 with a planned new location in Monte Rio.

A multi-distance trail running event at Calero County Park on May 30, 2026, featuring single track, hills, aid stations, and a commemorative medal for finishers. Distances range from a Kids Run up to a 50K described as a Western States trai..

A community run and expo in San Francisco on June 6, 2026 featuring group runs of 3.2 miles and 4.5 miles, vendor booths, a pancake breakfast, and a raffle with prizes.

Experience a scenic 10km loop through the Auburn State Recreation Area featuring rolling hills and oak forests. This trail run offers a mix of creek crossings and canyon climbs overlooking the American River.