Castro Valley
Trail Running Calendar near Castro Valley 2026-2027
Explore the top trail runs near Castro Valley for 2026-2027! We've gathered 79 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
August 2026
A 50K trail ultramarathon near San Francisco with about 6,600 feet of climbing across Coastal, Miwok, Matt Davis and Dipsea trails and a $10,000 prize purse.
A 5K trail race along the Lands End Trail in San Francisco with coastal views, finisher ribbons for all and awards for the top five overall runners.
A map based 5K and 10K navigation event in Fillmore and Japantown, San Francisco, with team options, checkpoint questions, and post event refreshments.
Limited field trail races on Angel Island with a 10K single loop and a half marathon that completes two loops, with ferry included in registration.
September 2026
Monthly community hike with an optional trail run in Richmond, organized by FIERCE Advocates and local partners on first Saturdays in 2026.
Trail races at Tilden Regional Park in Berkeley with distances from 10K to 50K, cupless aid stations about every 5–7 miles, and a 350-runner capacity.
A trail running event at Calero County Park offering distances from a kids run to a 50K across single-track and dirt roads, with named aid stations, drop bag support, bib color assignments, and time limits for longer races.
A 40th edition cross country meet in Golden Gate Park with an approximately 4 mile two loop course over grass, dirt, and rolling hills.
A family friendly 5K run in San Francisco with a scenic course from Mountain Lake Park to the USS San Francisco Memorial and post-race festivities.
Trail 5K with a steep first mile and flat fast finish, plus a kids run and member picnic at San Pedro Valley Park on September 20, 2026.
Trail event in Castro Valley featuring a 100k, 50 mile, and marathon with UTMB index status and firm time limits due to park permits.