Alameda County
Trail Running Calendar near Alameda County 2026-2027
Explore the top trail runs near Alameda County for 2026-2027! We've gathered 42 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.
A Thanksgiving Day vegan fundraiser at San Leandro Marina featuring a flat 5K, canicross with dogs, a 1 mile walk, and kids races supporting the Milo Foundation.
A community XC fun run on the Gunn High School 2.2 mile course in Palo Alto with pre-entry and race-day registration, retro shirts, novelty prizes, and kids' half-lapper races.
December 2026
Trail races at Lake Chabot in Castro Valley on New Year's Eve and New Year's Day with 5K, 13K, half marathon, 10K and a remote option.
January 2027
Trail focused 5K, 10K, half marathon and virtual option at Lake Chabot on January 1, 2027 with varied surfaces and rolling hills.
Multi-distance trail event at Almaden Quicksilver County Park on January 2, 2027, with dirt-road courses, aid stations, drop-bag service, and published time cutoffs.
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
Point to point half marathon from the Hacienda Entrance up to Mt Umunhum with 4,767 feet of ascent, marked aid stations, drop bag service and shuttle transport back to the start.
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 race at Santa Teresa County Park on April 3, 2027 offering 5K, 10K, 10 mile and half marathon on marked, hilly trails.
Trail races near Mount Diablo on April 3, 2027 with multiple distances and a portion of entry fees supporting Save Mount Diablo.