Trail Running calendar near Napa 2026-2027

Trailquake 2026 is a trail event in Saratoga on May 10 offering 5K, 10K and a half marathon through redwoods and pine forest, with local and remote entry options and finisher shirts.

Trail runs at Skyline Wilderness Park in Napa offer distances from 10K to 50K with steep Rim Rock climbs and valley views. Aid is touchless and parking is included with registration.

Run for Amma is a charity trail event on May 16, 2026 at Skyline Ridge Open Space Preserve near Los Gatos. Multiple distances from 10K to 50K are offered and all registration proceeds support UCSF cancer research.

An inaugural trail ultramarathon in Napa offering a 50 mile solo and a two-person 50 mile relay over two long loops through Skyline Wilderness Park and Suscol Headwaters, run as a cupless event with four aid stations and limited crew access..

A race in El Sobrante on May 16, 2026 offering Half Marathon, 10K and 5K distances plus a remote runner option. Tiered registration fees apply and the event supports the East Bay Regional Parks Campership Program.

Wild Rose Half Marathon & 5K in Roseville on May 16, 2026 offers a half marathon on the Pleasant Grove Bike Path and a 5K through William Hughes Park. Paved courses include multiple aid stations and post-race swag including a technical shir..

A point-to-point Half Marathon on May 16, 2026 in Almaden Quicksilver County Park, running from Mt. Umunhum down to the Hacienda Entrance with 1,909 ft of ascent, marked ribbons, aid stations and a 5.5-hour time limit.

Mud Factor Sacramento is a 5K mud and obstacle run on May 17, 2026 at the 300-acre Mahon Ranch, marking the event's 15th anniversary; it features adult and KIDZ family waves and a $10 spectator festival pass.

A community cross-country event at Spring Lake Regional Park featuring a 3 mile XC race and a 1K Bunny Hop for children 10 and under, in its 30th year with online registration and membership options available.

Trail races at China Camp State Park in San Rafael feature single-track routes with bay and Mount Tam views. Courses include a climb starting around 1.5 miles and distances from 3.1 to 13 miles.

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.

A community 5K and 10K run/walk at Seal Point Park in San Mateo on May 30, 2026, paired with a complimentary Wellness Fair. Race registration includes a t-shirt and finisher medal and team entries are eligible for a prize.

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 event at Calero County Park in San Jose on May 30, 2026, featuring single track, dirt paths and hilly terrain up to 50K, with aid stations, free parking and drop bag support for the 50K.

Global Running Fest at Sports Basement Berkeley on May 31 features free road, trail, and kids runs, brand shoe demos, live music and raffles with over $5,000 in prizes. Beer sales benefit the youth program Running for a Better Oakland.

A free community festival in San Francisco hosted by UltraSignup with social group runs of about 3.2 or 4.5 miles, an expo with brands and race directors, a pancake breakfast, raffle prizes, shoe demos, and local partners.

Trail races on the north shore of Lake Natoma in Fair Oaks with 5K and 10K courses through oak bluffs, wetlands, and historic dredge terrain. Proceeds benefit the Rachel Anne Gray Memorial Scholarship.

Lake Natoma Trail Run in Fair Oaks, CA on June 6, 2026 features 5K and 10K trail courses plus a kids run for under-10s. The route follows wetlands, oak and single-track trails on the north shore of Lake Natoma and supports a local scholarsh..

Experience the 42nd annual Lake Chabot Trail Challenge featuring a scenic half marathon loop and a paved 5K run. Enjoy views of the San Francisco Bay and Mt Diablo while competing for medals on chip timed courses.