Clayton
Trail Running Calendar near Clayton 2026-2027
Explore the top trail runs near Clayton for 2026-2027! We've gathered 34 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
November 2026
11th Annual Nomadic 5K Trail Run at Arbolado Park in Walnut Creek on November 21, 2026, a community 5K with a walk option, Mongolian food and kids activities.
Thanksgiving fundraiser at San Leandro Marina with 5K, canicross, 1-mile and kids races supporting the Milo Foundation.
December 2026
A San Francisco cross country event on Sunday, December 6, 2026 offering 5K, 10K and a Naughty Nine Miler with live and virtual options and race swag for all.
A community fundraiser at Joaquin Miller Park featuring a 5K trail run and a 1 mile kids fun run on 12/06/2026.
Trail races at Lake Chabot in Castro Valley on December 31, 2026 offering half marathon, 13K, 10K and 5K with hikers and walkers welcome.
January 2027
Trail focused 5K, 10K, half marathon and virtual option at Lake Chabot on January 1, 2027 with varied surfaces and rolling hills.
Two-day trail event in San Francisco on January 23-24, 2027 offering 15K, 25K, 50K and 50 mile courses through the Marin Headlands and over the Golden Gate Bridge.
Mixed-surface runs at Coyote Hills Regional Park with 5K, 10K and half marathon options, stocked aid stations and GPX course files available.
February 2027
Trail races from 5K to 50K through eucalyptus forests and lakeside trails at Lake Chabot Regional Park near Castro Valley, CA.
March 2027
Multiple trail distances run through Redwood Regional Park on March 20, 2027 at Chabot Space & Science Center. Routes use East Ridge, West Ridge, Stream and Bridle trails and distances were measured with a Rolatape surveyor's wheel.
Multi-distance race on March 27 2027 at Quarry Lakes Regional Recreation Area in Fremont featuring a mostly flat course on the historic Western Pacific Trail.
April 2027
Trail races near Mount Diablo on April 3, 2027 with multiple distances and a portion of entry fees supporting Save Mount Diablo.
A hilly loop race around Angel Island offering a 10K single loop and a Half Marathon that repeats the loop, limited to 400 participants with athlete ferry included.
Trail races at Lake Chabot Regional Park around the reservoir, with distances from a 50-yard kids dash up to a 50K measured for accuracy.