Trail Running calendar near Fairfield 2026-2027

Trail races around Auburn, California, across the Western States Trail with four distances from 25 km to 161 km; the 100K awards Western States Golden Tickets and the event qualifies for UTMB World Series Finals.

Trail race on Mt Tamalpais with a Half Marathon and 10K on coastal ridge single-track and road, limited to 300 participants, with aid stations, course markings, and participant t-shirts.

Trail races held inside Marshall Gold Discovery State Historic Park near Coloma offer distances from a kids run to a half marathon. Courses mix singletrack, switchbacks and paved sections, with marked routes, aid stations and on-course mars..

A 62 mile trail ultramarathon in the Marin Headlands near Stinson Beach, CA, featuring over 11,000 feet of climbing, marked trails and staffed aid stations with medical crews. Entry is limited to 400 runners and a four person relay is offer..

A lakeside trail race at Browns Ravine Marina on May 2, 2026, offering 10K, half marathon, 35K and 50K distances along the southern shore of Folsom Lake with stocked aid stations and limited field capacity.

Tails & Trails is a charitable run and walk supporting Dogwood Animal Rescue. Choose from a 5K, Dogwood Dash, or a virtual option on May 3, 2026. Registration opens in March.

A trail run on Pacific Union College trails in Angwin, CA on May 3, 2026 offering a 1 Mile Kids Run for ages 7 to 12, plus 10K and 26K distances. The event is cupless and proceeds benefit PUC Athletics.

Trail races from Stinson Beach into Muir Woods include a marathon, half marathon and a 7 mile course. Routes use the Dipsea Trail and Steep Ravine with ladders and stair sections, feature multiple aid stations, and are limited to 300 partic..

Trail race on May 9, 2026 at Lake Anza in Tilden Regional Park offering distances from 10K to 50K plus a free kids 50 yd dash. Courses are marked, aid stations occur every 3 to 4 miles, and the event uses a cupless aid protocol.

Trail races on May 9, 2026 at Almaden Quicksilver County Park near San Jose, offering 50K and 100K on scenic single-track and fire roads. The 100K is a Western States qualifier and half the proceeds support local non-profits.

This inaugural half marathon offers a scenic tour of Napa Valley, running on closed vineyard roads from Quintessa Winery to Yountville. The race includes shuttle transport, a custom medal, and concludes with a Wine Village celebration featu..

Trail race in Cool, California on May 9, 2026 featuring single track, creek crossings, and varied terrain. Two distances are offered, **10.3 miles** and **5.8 miles**, and the event is limited to 600 participants.

A community running event in Los Altos Hills featuring hilly 5K and 10K courses plus a 1 Mile Fun Run, with the route starting at Westwind Community Barn and passing through Byrne Preserve and local pathways.

Trailquake invites participants to run, hike, or walk through the beautiful redwood and pine trails of Saratoga. With a 5K, 10K, or half marathon to choose from, all finishers receive a custom medal and shirt. This challenging trail event i..

Trail runs at Skyline Wilderness Park in Napa with 50K, 30K, 21K and 10K options. Routes include steep Rim Rock climbs, summit views, cupless aid stations, and on-course water-only sections for longer distances.

A charity trail event in Los Gatos supporting UCSF cancer research, offering 50K, 30K and 10K routes at Skyline Ridge Open Space Preserve on May 16, 2026.

The inaugural Rim Rock 50 Mile Trail Challenge traverses the rugged trails of Napa's Skyline Wilderness Park. Solo runners and relay teams tackle a two-loop course through oak woodlands and exposed ridgelines. The event emphasizes environme..

Trail trail race at Wildcat Canyon Regional Park near El Sobrante offering a half marathon, 10K and 5K with wide Bay Area views, chip timing, medals and shirts. Walkers and hikers are welcome.

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..

Trail runs at China Camp State Park on May 23, 2026 feature 5K, 10K and half marathon courses on single track and fire roads with prominent climbs, marked aid stations, a cupless policy, and limited field size.