Trail Running calendar near Duncans Mills 2025-2026

Challenge scenic, technical trails above Calistoga with 50K, 35K, half marathon and 10K options, several UTMB index races. Big climbs, remote single track and a custom finisher medal and race shirt for every finisher.

Run the Mendocino Coast 50K along rugged coastal and forest trails, with river, redwood and waterfall scenery. Start at Big River State Beach and finish on bluffs above the Pacific for unforgettable ocean views.

Run the scenic trails of Annadel State Park at the Annadel Half Marathon in Santa Rosa on April 18, 2026, with half marathon, 10K, and 5K options for all paces. Proceeds support Trione Annadel State Park and Sonoma County Parks Foundation.

Join the No Foolin' Foot Race in San Carlos on April 18, 2026 with 1K kids, 5K, 10K and a new 15K route across Big Canyon, Eaton and Pulgas Ridge. Festival vibes, tech shirts, pro timing and proceeds help local trails.

Hit the trails at the Mt Tam Wild Boar Half Marathon or 10K along Bolinas Ridge with stunning Pacific and lagoon views. Limited to 300 runners, this intimate trail race returns April 25, 2026.

Take on the Miwok 100K in the Marin Headlands near Stinson Beach, a scenic 62 mile trail with 11,000 feet of climbing. Limited to 400 runners, the well supported, low waste event offers relay and training options plus finisher swag.

Join Tails & Trails on May 3, 2026 in Windsor, CA for a charitable walk and run supporting Dogwood Animal Rescue. Choose a 5K, the family friendly Dogwood Dash, or participate virtually while helping animals in need.

Join Angwin to Angwish, a scenic trail run through Pacific Union College woods with 26K, 10K and a 1 Mile Kids Run for ages 7 to 12. Family friendly, cupless event with race day check in and proceeds benefiting PUC Athletics.

Run the classic Stinson Beach to Muir Woods trails on May 9, 2026, choosing marathon, half or 7 mile routes in a limited 300 runner field for an intimate race experience. Expect rugged coastal redwood paths, creek crossings and rewarding pa..

Join the Waves & Whales 5K in Point Arena for a scenic coastal loop along bluffs and forest. All ages welcome and proceeds benefit a youth conservation program, with participants receiving an organic cotton tee and snacks.

Run the scenic Berkeley hills from Lake Anza in Tilden Park with distances from 10K to a rugged 50K, plus a free kids dash. Register early for a tee, all finishers get a custom medal, and parking is free.

Join the Wine Half Marathon in Napa Valley on May 9, 2026, a 13.1 mile route through vineyards from Rutherford to Yountville. Founded by four French American wine professionals, the race blends warm hospitality, surprises, and scenic trails..

Hit rugged singletrack at the Napa Wilderness Trail Runs in Skyline Wilderness Park, with 10K, 21K, 30K and 50K options. Expect steep climbs, sweeping valley views, spaced aid stations and a true backcountry trail experience.

Run Napa's Rim Rock 50, a rugged two loop trail challenge with solo and two person relay options. Camp at Skyline Wilderness Park and refill at cupless aid stations while enjoying scenic wildland views.

Join Wildcat 2026 on May 16, 2026 in El Sobrante for a road race offering half marathon, 10K, 5K and a remote option. Enjoy sweeping 360 degree views of the Bay Area while supporting the East Bay Regional Parks Campership Program.

Hit the trails at Point Pinole Regional Shoreline on May 30, 2026 for Nitro Trail, a scenic trail running festival offering a half marathon, 10K and 5K. Choose a hiker start for a relaxed pace or join remotely while supporting local parks.

Cinderella Trail Run at Joaquin Miller Park, Oakland on May 30 offers distances from 8K to 50K plus a free kids dash. Run scenic redwood trails, earn a custom finisher medal, and enjoy stocked aid stations and shirts for pre registrants.

Join a community 5K run or walk along the scenic bay trail at Seal Point Park, capped off with a free Wellness Fair featuring local health and wellness vendors. Race registration includes a T shirt and supports mental and community wellness..

Run scenic trails at Lake Chabot on June 7, 2026 in a chip timed half marathon or 5K with ridge top views of Mt Diablo and the Bay. Presented by Castro Valley Sports Foundation as a fundraiser with finisher medals.

Run the Bay Area 100 on June 13, 2026, a point to point 100 mile race from UC Berkeley to Skyline High in Oakland. Enjoy epic East Bay ridge and redwood scenery with about 18,000 ft of climbing and a 33 hour cutoff.