Clayton
Trail Running Calendar near Clayton 2026-2027
Explore the top trail runs near Clayton for 2026-2027! We've gathered 37 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
January 2027
A mixed-surface running event at Coyote Hills Regional Park offering a half marathon, 10K, and 5K with updated courses, GPX files, and stocked aid stations.
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.
Half marathon, 10K, 5K and a Remote Runner entry at Quarry Lakes in Fremont on March 27, 2027 on a mostly flat course that follows part of the historic Western Pacific Trail.
April 2027
Trail running event near Mount Diablo on April 3, 2027 offering 50K, half marathon, 10K, 5K and remote options while supporting Save Mount Diablo.
A hilly loop race around Angel Island offering a Half Marathon and 10K, limited to 400 participants with ferry access from Tiburon and a 3.5 hour course cutoff.
Badger Cove is a running event in Livermore, CA on April 17, 2027 offering a half marathon, 10K, 5K and a hiker division. Registration opens January 1 and closes February 2 with fees varying by event.
A trail event at Lake Chabot Regional Park offering distances from a 50‑yard kids dash to a 50K ultramarathon. The looped course circles the Lake Chabot reservoir and surrounding hills with measured distances.
May 2027
A race day in El Sobrante with a half marathon, 10K, 5K and a hiker division through the hills of Wilcat Canyon; registration windows and fees vary by distance.
June 2027
A 100 mile point to point ultramarathon through the East Bay starting at California Memorial Stadium, featuring 18,000 feet of climbing and a 33 hour finish limit.
August 2027
An annual August trail event at Lake Chabot Marina featuring a 50K loop through East Bay parks and a looped half marathon with strong volunteer aid and a plant based finish.