Trail Running Calendar California 2026-2027

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..

Tails & Trails is a charitable walk/run supporting an animal rescue. The event on May 3, 2026, in Windsor, CA, features a 5K and a Dogwood Dash, with a virtual option also available.

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.

An annual 10K trail event in Glendale with a climb to 2,536 feet and panoramic views of the L.A. Basin and San Gabriel Mountains. Produced by the City of Glendale and benefiting the Glendale Parks and Open Space Foundation.

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..

Run or walk through conifer forests and along coastal bluffs in Point Arena. This sustainable 5K trail event supports local environmental education and youth stewardship on the Mendocino Coast.

Experience the scenery of Tilden Regional Park at the Grizzly Peak Trail Run. Choose from various distances including a 50K and marathon starting from the shores of Lake Anza in Berkeley.

The 30th annual Paiute Meadows Trail Run explores the scenic single-track trails of Susanville Ranch Park. Runners can choose from distances including a 50K, 30K, half marathon, and a free kids' race. It's a cupless event with well-stocked..

Experience the diverse landscapes of Monterey County with courses ranging from a family friendly 1 mile run to a 35K trail race through the Palo Corona Backcountry. Enjoy exclusive access to protected lands and coastal vistas.

Chase the legend through the scenic Dry Creek Preserve. This unique 5k trail run features river crossings and a playful Sasquatch theme. Part of the proceeds support the local nature preserve.

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..

Kick off the trail running season with the Dirty Secret Trail Run in Cool, California. Choose from a 10.3 or 5.8 mile course featuring single-track trails, meadows, and a creek crossing. Finish with a strawberry pancake breakfast and a cust..

Challenge yourself on the scenic trails of Crystal Cove State Park. Choose from 5K, 25K, or 50K distances with hill climbs and ocean views. Your run supports the John Wayne Cancer Foundation's fight against cancer.

Celebrate the 24th year of this community event in Los Altos Hills. Run or walk through the Westwind Community Barn and Byrne Preserve on hilly 5K, 10K, or 1 mile courses.

This trail run takes place at the scenic Sly Park Recreation Area near Jenkinson Lake. Runners can choose from seven different distances, from a 5K to a 50K. The course is marked with ribbons and signs, and all finishers get a medal.

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..