Trail Running calendar near Fremont 2026-2027

Escape the wrath of Krampus with this themed cross-country run in San Francisco or from anywhere. Choose from 5K, 10K, or a nine-mile course. All finishers get unique Krampus themed swag, including a woodallion and beer stein.

This event takes runners on flat, fast courses through the scenic Quarry Lakes park and along the Alameda Creek Trail. It features multiple distances including a certified half marathon, plus special youth and free kids' races. All finisher..

The Calero Trail Run (Winter) takes place on the trails of Calero County Park in San Jose. Runners can choose from a wide range of distances, from a 1-mile run to a 50K ultramarathon. The courses feature hills, single-track, and panoramic v..

The Hunter S. Thompson Fear & Loathing will take place in San Francisco on Sunday 6 December 2026. You can run between 50 and 50 miles.

Run through the redwoods and pines of Sanborn County Park. Choose from a half marathon, 10K, or 5K on scenic single-track trails. Walkers are welcome and all finishers get a medal.

Ring in the new year with a trail run at Lake Chabot. Choose from a half marathon, 10K, or 5K on New Year's Eve. For a special challenge, run both days to earn the Mega-Medal.

Start the new year with a run at Lake Chabot in Castro Valley. Choose from a half marathon, 10K, or 5K on January 1st. This event is part of the Brazen Ultra Half Series, offering a trail challenge.

Explore the redwood trails of Huddart Park across distances from 8K to 50K. The routes offer varied terrain and significant elevation gain, with full aid station support. All finishers receive a custom medal in this cupless event.

Run or walk scenic bay trails at Coyote Hills Regional Park. Choose from three distances: half marathon, 10K, or 5K on a course with minimal climbing. Aid stations are available, and a Hiker Division is offered for walkers.