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 limited-field island race on August 29, 2026 featuring a scenic half marathon and 10K circling Angel Island with ferry access and medals for half finishers.
A waterfront 5K through Crissy Field and Fort Point Promenade in San Francisco on August 30, 2026, with live and virtual entry options and advance registration required.
September 2026
Monthly Richmond meetups offering a community hike plus an optional trail-run option, organized by FIERCE Advocates with Moving Forward and Richmond Run Club.
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.
Rocky Ridge in the Las Trampas Wilderness near San Ramon on September 19, 2026 features a half marathon, 10K and 5K on hilly trail terrain with remote runner options.
Family friendly Jog in the Fog 5K in San Francisco with a scenic 3.4 mile course, post race activities, age group awards, and a race t shirt for registrants.
Historic Bay Area trail event offering 100K, 50 mile and marathon courses, all UTMB indexed with the 50 mile in the Pacific USATF Grand Prix.
Trail running in shaded redwood forest at Sanborn County Park on September 27 2026, with 10K, half marathon and 50K options; steep singletrack, shuttle parking, chip timing and specific mandatory gear for the 50K.
October 2026
A weekend of Olympic-distance triathlon, an Olympic relay, a trail half marathon and a kids fun event at McNear’s Beach Park in San Rafael.
Experience a trail half marathon on San Bruno Mountain featuring 2,400 feet of elevation gain and stunning views. Enjoy a scenic route with 93 percent trail coverage followed by a post race meal and finishers medal.
21st Annual Garin Park XC Challenge at Garin Regional Park is a USATF Pacific Association cross country meet with about 5K courses featuring hills, scenic views, and a half mile flat finish.