Almaden Hills Trail Run - Summer

The Calero Trail Run - Spring offers various distances ranging from 5K to 50K, starting at Calero County Park in San Jose, CA. The trail features single tracks, hills, and dirt paths, providing a challenging yet scenic experience. The 50K route is particularly recommended for those training for West..

The Lake Chabot Trail Challenge Half Marathon and 5K is set to be the 2024 RRCA Trail Half Marathon State Championship. The event, organized by the Castro Valley Sports Foundation, will take place at Lake Chabot in Castro Valley, CA. The half marathon course offers scenic views of Lake Chabot, Mt. D..

The Mt. Umunhum Ultras is an exclusive trail racing event offering a variety of distances including a 52 Mile, 50K, Trail Marathon, 30K, Half Marathon, 9 Mile, 10K, and 5K. The races take place in the Santa Clara Valley, Sierra Azul Open Space Preserve, and the Santa Cruz Mountains, providing runner..

The Trailquake will take place in Saratoga on Saturday 8 June 2024. You can run between 5 and 21 kilometers.

The Loch Chabot trail run takes place at Loch Chabot Regional Park in Castro Valley, CA. Participants can choose from a half marathon, 7-mile, or 5K course, with the 5K being entirely paved, the 7-mile split between pavement and trail, and the half marathon mostly on trails. The event offers both li..

The Quarry Lakes Trail Run offers various distances including a 5K, 10K, half marathon, and kids' runs in a scenic setting at the Quarry Lakes Regional Recreation Area in Fremont, CA. The courses are flat and fast, following the Alameda Creek Trail up to the mouth of Niles Canyon. The event features..