Trail Running calendar near Piedmont 2026-2027

A 6.45 miles trail race in Annadel State Park organized by the Empire Runners Club, held in early September with staggered age and gender starts, limited to 100 runners and awards for the top 13 finishers.

Experience the trails of China Camp State Park with a selection of distances including a 5K 10K and Half Marathon. Participants enjoy a post race festival with beer steins custom medals and local snacks.

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 race at Stevens Creek County Park in Cupertino offering a Half Marathon, 11K, and a charity 2.5-mile Lollipop Loop with aid stations and post-race barbecue.

Run through Bishop Ranch and San Ramon in this diverse racing event. Choose between a half marathon, 10k, 5k, or beer mile before enjoying unlimited tastings with your finisher medal.

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.

An annual stadium stair climb and memorial walk at UC Davis Health Stadium honoring 9/11 first responders, with proceeds supporting the UC Davis Police Emergency Scholarship.

Trail-based half marathon plus 5K and 10K with hills and scenic views in San Ramon on September 19, 2026; virtual entries available.

Rebels XC Challenge is an in-person cross-country meet in Carmichael CA on September 19 2026 featuring Women's, Masters Men's and Open Men's races with a listed fee of USD 30.

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.

Community-supported Belmont Water Dog Run in Belmont, CA features 5K, 10K, kids' mile, a pet-friendly Fido Mile, and a virtual option on September 26, 2026.

A community ultramarathon and hike at Skyline Wilderness Park in Napa, CA, featuring a 3.3-mile loop repeated up to ten times in an hourly format to raise funds for the Pheo Para Alliance.

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.

Multi-day event at McNear’s Beach Park in San Rafael featuring an Olympic triathlon, relay, a kids triathlon, a trail half marathon, and a combined challenge.

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.

Run by the Sea at Wilder Ranch State Park on October 4, 2026 offers a Half Marathon, 12K and 4K run/walk along mostly flat packed dirt trails with coastal bluff and Monterey Bay views. Organized by the Santa Cruz Track Club; proceeds benefi..

Test your endurance at Lake Merced in San Francisco with a scenic 4.5 mile loop course. Choose between a standard run or tackle ultra marathon distances including the 50K and 50 mile events.