Trail Running calendar near Fremont 2026-2027

A trail running event in San Carlos on April 18, 2026 offering 1K kids, 5K, 10K and a new 15K with substantial climbing through Big Canyon Eaton and Pulgas Ridge. Festival atmosphere at Crestview Park with timed results and awards.

Explore the forested trails of Huddart Park and Purisima Creek Redwoods on the San Francisco Peninsula. Choose from four distances, from a 10K to a 50K, on courses featuring redwood canyons and ridge-line views. All finishers get a custom m..

The Mt. Tam Wild Boar Half Marathon & 10K is a scenic trail run on Mt. Tamalpais with ocean views. Taking place on April 25, 2026, it features half marathon and 10K distances. Participants receive T-shirts, and half marathon finishers get m..

The Miwok 100K is a classic 62-mile trail ultramarathon in the Marin Headlands, featuring over 11,000 feet of climbing. This iconic race, which starts in Stinson Beach, is a qualifier for major events like Western States.

This inaugural trail run takes you through Jack London's historic Beauty Ranch in Sonoma. Choose from a half marathon or 5 mile course past vineyards and into pristine hillsides. The event includes participant T-shirts and finisher medals f..

Run the forested trails of Napa Valley's Pacific Union College. Choose from 26K, 10K, or a kids' mile, with proceeds supporting college athletics. Remember to bring your own water bottle for this cupless event.

This 36th annual trail run starts at Stinson Beach and climbs into the iconic redwood forests of Muir Woods. Choose from marathon, half marathon, or 7-mile distances on a course featuring wooden ladders, staircases, and panoramic views. The..

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.

Event Overview The Race for Open Space is a one day trail running event in Monterey County. It is a fundraiser and awareness campaign for the Big Sur Land Trust, supporting land conservation and access to parks. The event is centered around..

Quicksilver Endurance Runs The Quicksilver Endurance Runs is a trail running event in its 41st edition. The event features two races with significant elevation gain. The 100K race has approximately 13,000 feet of elevation gain and is a Wes..

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..

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 2026 invites runners to the forested trails of Saratoga, California. Choose from a 5K, 10K, or half marathon course beneath the redwoods and pines. The event is scheduled for a Sunday in May.

Celebrate Mother's Day on May 10th with a family-friendly run or walk. The event, held at Pinto Lake County Park, features a 1K kids run, 5K, and 10K. Your participation benefits Pajaro Valley Shelter Services.

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.

Run for Amma is a 15th-anniversary charity trail run supporting cancer research at UCSF. The event features 50K, 30K, and 10K distances through Skyline Ridge Open Space Preserve. All registration proceeds go directly to fund cutting-edge ca..

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..

The Wildcat 2026 offers a Half Marathon, 10K, and 5K with spectacular Bay Area views. The event supports the East Bay Regional Parks Campership Program and takes place in El Sobrante, California.

The China Camp Trail Run features 5K, 10K, and Half Marathon courses through scenic trails at China Camp State Park. With bay views and a cupless format, runners carry their own water. Finishers earn custom medals, and top performers receiv..

Run the original Brazen Racing event at historic Point Pinole. Choose from a half marathon, 10K, or 5K trail race. Runners and walkers are both welcome to participate.