Trail Running calendar near Windsor 2025-2026

Experience panoramic Bay views on the hilly trails of Angel Island with 5, 10, and 15 mile options and a free kids dash. Finishers earn custom medals and pre registered runners receive shirts; a charter ferry from Tiburon is required.

The The Rattlesnake Ramble will take place in Santa Venetia from Friday 13 March 2026 to Monday 16 March 2026. You can run between 5 and 21 kilometers.

Tackle the Marin Ultra Challenge through the Marin Headlands, Mt Tamalpais and Muir Woods with sweeping coastal views and cathedral redwoods. Choose 50K or 50 mile trail courses with live tracking, aid stations and a festive finish at Rodeo..

Event overview The Napa Valley Trail event takes place on Saturday, March 21, 2026, at Bothe-Napa Valley State Park in Saint Helena, California. The race is limited to 300 participants. Distances offered: Marathon Half Marathon 10K The ev..

Run through towering redwoods in Oakland's Redwood Regional Park with distances from a kids 50 yard dash to a challenging 50K. Enjoy ribbon marked singletrack, stocked aid stations, custom finisher medals, and awards for top finishers.

Run the scenic Lag Bon 10K on Sunday, March 22, 2026, along lakeside trails in Fairfax for a springtime challenge. Proceeds support Evidence Action's Safe Water Now program in honor of World Water Day.

Join the Bad Ass Backyard Ultra in Rio Linda on March 28 2026, a repeated 4.16 mile loop starting each hour. Keep running until you are the last person to complete a loop and claim victory.

Event details The 41st annual Golden Gate Headlands race takes place on Saturday, April 4, 2026, at the Marin Headlands Visitor Center and Fort Barry area in Mill Valley, California. The event offers multiple distances: Marathon Half Marat..

Run scenic trails around Mount Diablo with distances from 5K to 50K, including a Brazen Ultra Half Series half marathon. Brazen Racing hosts this April event that benefits Save Mount Diablo and celebrates the region's protected open space.

Event overview The 35th annual Romancing the Island event takes place on April 11, 2026 at Angel Island State Park, Belvedere Tiburon, CA. The race offers two distances: Half Marathon - completes the island loop twice 10K - single loop aro..

Join TERREX Lake Sonoma for a weekend of scenic trails with a Western States qualifier 100K, a 50K and the Trail Sisters women only half. Enjoy lake views, big climbs, camping and cupless aid stations with shuttles to Lone Rock.

Run rugged Napa Valley trails from Calistoga into Robert Louis Stevenson State Park and up Mount St. Helena on technical single track and fire road. Choose 50K, 35K, half marathon or 10K out and back for big views and serious climbs.

Run the Mendocino Coast 50K on trails that wind through river valleys, redwood forest and ocean bluffs. Finish above Mendocino Village with sweeping Pacific views for an unforgettable coastal ultra.

Event The 2026 Mt. Tam Wild Boar Half Marathon & 10K takes place on April 25, 2026, at Mt. Tamalpais State Park in Mill Valley, California. The event is limited to 300 participants. Distances offered: Half Marathon 10K Course and logi..

Miwok 100K invites trail runners to tackle scenic single track routes with views of the Golden Gate, redwoods and Point Reyes. Choose the solo 100K, a four person relay, or add a paired training plan for a supported, eco minded experience.

Join Tails & Trails in Windsor on May 3, 2026 for a fun charitable walk and run supporting Dogwood Animal Rescue. Choose a 5K, the playful Dogwood Dash, or participate virtually to help animals and enjoy community spirit.

2026 Stinson Beach/Muir Woods Marathon, Half Marathon & 7 Mile The event takes place on May 9, 2026, at Stinson Beach Parking Lot in Stinson Beach, California. It is the 36th annual edition and the field is limited to 300 participants...

Run scenic trails around Lake Anza at the Grizzly Peak Trail Run in Tilden Regional Park on May 9, 2026. Distances range from a kids dash to a 50K, with shirts for preregistered runners, custom finisher medals and stocked aid stations.

Experience the Waves & Whales 5K in Point Arena on May 9, 2026: a scenic run along coastal bluffs and through pine and cypress forest. Hikers welcome; organic tee and snacks provided, with proceeds supporting youth coastal conservation.

Napa Wilderness Trail Runs on May 16, 2026 at Skyline Wilderness Park offers 10K, 21K, 30K and 50K on scenic, rugged trails with steep climbs and sweeping valley views. Bring your own cup for touchless aid stations.