Trail Running calendar near Gilroy 2026-2027

Trail races on hilly mixed dirt and single track at Almaden Quicksilver Park with distances from 5K to 50K, aid stations, drop bag service for longer races, and mandatory course markings and cutoffs.

Trail races of 10K, half marathon and 30K through Henry Cowell Redwoods State Park with single track, sand ridge and river crossings. Aid stations are spaced every five to six miles and the event is cupless.

Navigate through historic San Francisco neighborhoods and parks in this unique 5K or 10K challenge. Use a custom map to find checkpoints and solve riddles individually or in teams of up to five people.

A scenic loop trail race around Angel Island with a single-loop 10K and a half marathon that runs the loop twice; ferry transport is required and included in race pricing, and the field is limited to 400 participants.

Explore the scenic trails of Huddart Park and Bear Gulch at this multi distance trail event. Runners can choose from distances ranging from 8K to 50K through redwood forests and lush ferns.

Explore the gentle trails of Pinto Lake County Park at the Apple City 5k. This inaugural event celebrates the agricultural roots of Watsonville's Pajaro Valley. The race supports local students, with half of its proceeds going to the Pajaro..

Experience the natural scenery of Mount Diablo State Park through a variety of trail races. Runners can select distances ranging from 4 miles to a 50K with spectacular views of the San Francisco Bay Area.

Trail races in Tilden Regional Park offering 50K, 35K, half marathon and 10K distances with aid stations every 5 to 7 miles, a cupless format, limited field of 350, technical shirts, and finish awards across multiple categories.

Trail races at Stevens Creek Reservoir include a Half Marathon, 11K and a 2.5 mile charity Lollipop Loop on shaded singletrack and ridge trails. The field is limited and aid stations provide food and drinks.

A trail running event at Calero County Park offering distances from a kids run to a 50K across single-track and dirt roads, with named aid stations, drop bag support, bib color assignments, and time limits for longer races.

Trail running event in Las Trampas Wilderness on September 19, 2026, offering a half marathon, 10K and 5K with hilly trail terrain and scenic vistas. Remote participation options and a parks campership fundraiser are included.

Dick Collins Firetrails in Castro Valley features a 100k, a 50-mile race, and a marathon on Lake Chabot park trails. The event is UTMB Index and the 50-mile race counts toward the Pacific USATF Grand Prix.

Trail marathon, half marathon and 5 mile at Andrew Molera State Park on September 26, 2026. The route follows Old Coast Rd with marked aid stations, a 6.5 hour cutoff and a 300 participant limit.

Trail races run through shaded redwood forest in Sanborn County Park on Sep 27, 2026, with 50K, half marathon and 10K options and spectator access.

Trailblazer Race in Mountain View offers 10K, 5K, a 3-mile walk and a kids 1-mile run on Stevens Creek Trail and Shoreline Park, plus a festival and activities. Proceeds benefit Friends of Stevens Creek Trail.

Experience a trail half marathon on San Bruno Mountain featuring 2,400 feet of elevation gain and stunning views. Enjoy a scenic route with 93 percent trail coverage followed by a post race meal and finishers medal.

Run by the Sea at Wilder Ranch State Park on October 4, 2026 offers a Half Marathon, 12K and 4K run/walk along mostly flat packed dirt trails with coastal bluff and Monterey Bay views. Organized by the Santa Cruz Track Club; proceeds benefi..

Test your endurance at Lake Merced in San Francisco with a scenic 4.5 mile loop course. Choose between a standard run or tackle ultra marathon distances including the 50K and 50 mile events.

A trail race at Almaden Quicksilver County Park with distances from 5K to 50K. Courses are out-and-back, marked with colored ribbons, include aid stations and toilets, and the longer races reach Bald Mountain and Mt. Umunhum.

A roughly 12 mile loop from Mitchell Canyon to the Mount Diablo summit and back, with about 4,200 feet of elevation change. The course includes steep climbs via Eagle Peak and Bald Ridge and a five hour cutoff.