Sunnyvale
Trail Running Calendar near Sunnyvale 2026-2027
Explore the top trail runs near Sunnyvale for 2026-2027! We've gathered 49 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
December 2026
New Year's Eve at Lake Chabot in Castro Valley offers trail races on December 31, 2026, with a half marathon, 10K and 5K; walkers and hikers are welcome and free photos are provided.
January 2027
Multi-distance trail races at Lake Chabot across New Year's Eve and New Year's Day, including 5K, 10K, a half marathon and a virtual option.
Trail races at Almaden Quicksilver Park on January 2, 2027 offering distances from a kids run to a 50K with marked dirt road courses and multiple aid stations.
Scenic races at Coyote Hills Regional Park offering half marathon, 10K and 5K on varied surfaces with rolling bay views 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
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.
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
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.
No Foolin' Foot Race in San Carlos on April 24, 2027 offers 15K, 10K, 5K and a 1K kids trail course across Big Canyon, Eaton and Pulgas Ridge, with proceeds supporting local open space trail maintenance.
May 2027