Trail Running calendar near Scotts Valley 2026-2027

The Zoom Angel Island will take place in Tiburon on Sunday 1 March 2026. You can run between 5 and 15 miles.

Trail event near La Honda, CA offering 10K, half marathon and 50K routes across Skyline, Russian Ridge and Monte Bello preserves, with varied surfaces, multiple aid stations and specified cutoffs.

A spring trail event at China Camp State Park offering live and virtual 5K, 10K and half marathon options. Courses include technical single track and substantial elevation and organizers do not offer refunds.

Event Overview The Marin Ultra Challenge is a long-distance trail race in Marin County, California. It will be held on Saturday, March 14, 2026. The event offers two race distances: 50 miles and 50K. It is described as a physically demandin..

A trail running weekend in Marinwood, California, with 28K and 50K single loops plus a point-to-point 100K, featuring routes that summit several high points and offer wide views across the San Francisco Bay Area.

A trail event in Oakland through Redwood Regional Park offering distances from a kids 50 yd dash to a 50K. Marked loops, aid stations every 5 to 6 miles, cupless event.

A 22.5K event in Clayton, California on March 21, 2026, organized by Nomadic Adventure Club; registration closes March 20 and donations support the club’s free community initiatives.

The Lag Bon 10K is a trail race on March 22, 2026, in the Marin County watershed. This event supports clean water initiatives while offering a technical 10 km course with views of local reservoirs. Registration is limited to 100 runners.

A half marathon on March 22, 2026 in La Honda, California, the Horseshoe Lake course runs through Skyline Ridge Open Space Preserve with ocean and bay views. The trail mix and 2230' ascent support The Hatuey Project with entry fees matched..

Join the Western Pacific event on a mostly flat course in Fremont, California. Run on historic trails along Alameda Creek, starting and finishing at Quarry Lakes. Choose from the half marathon, 10K, or 5K distances.

Explore the scenic trails of the Golden Gate Headlands. This event offers a marathon, half marathon, and 10K distance on April 4, 2026.

The Diablo Trails Challenge offers four trail distances on Mount Diablo. A portion of entry fees supports the conservation work of Save Mount Diablo. The half marathon is part of the challenging Brazen Ultra Half Series.

Run a scenic, hilly loop around Angel Island with views of the Golden Gate Bridge and San Francisco Bay. The event includes a half marathon and a 10K, with ferry transportation from Tiburon included in the entry fee. Participation is limite..

Multiple marked trail distances circle Lake Chabot reservoir in Castro Valley, from a free 50 yard kids dash to a 50K. Aid stations occur every 4 to 5 miles and the event operates cupless, so bring a personal cup or soft flask.

Run the scenic trails at Lake Del Valle Regional Park in Livermore. The Badger Cove event offers a Half Marathon, 10K, and 5K on April 18, 2026, with walkers and hikers welcome. The half marathon is part of a challenging trail series.

Trail race at Skyline Ridge Open Space Preserve on April 18, 2026 offering distances from a kids 50 yard dash to a 50K. Routes run mostly on the Bay Area Ridge Trail with marked aid stations and a cupless hydration policy.

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 ultra. The event finishes with awards, custom medals, and aid stations stocked with fuel..

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.