Calero Hills Trail Fest

San Jose, United States • 26 Jul 2025

The Calero Hills Trail Fest is a trail running event held at Calero County Park in San Jose, California. Participants can choose from various distances, including marathon, 30K, half marathon, 10-mile, 10K, and 5K courses. The race features challenging terrain with single track trails, hills, and dirt paths through scenic oak groves, offering excellent heat training and panoramic views. The event includes aid stations, marked courses, and a commemorative medal for finishers. Registration is available on race day, and the event emphasizes endurance and outdoor adventure in a beautiful natural setting. Visit the organization's website for the most recent information.

Race information

26 mi
Marathon
30 km
30k
13 mi
Half Marathon
10 mi
10 Mile
10 km
10k
5 km
Visit the organization's website for the most recent information.
Trail runs nearby

The Quicksilver Endurance Runs is an annual trail running event held in San Jose, California, featuring 50K and 100K races on scenic, challenging single-track trails and fire roads through oak forests, meadows, and ridges with panoramic views of the Santa Clara Valley and Santa Cruz Mountains. The 1..

The 13 Mile Trail Race Top Down is a scenic trail running event held in San Jose, California, featuring a half marathon course through Almaden Quicksilver Park and Sierra Azul Open Space Preserve. Participants are transported from Almaden Quicksilver Park to the starting point at Mt. Umunhum, where..

Trailquake is a trail running event held at Sanborn Park in Saratoga, California, featuring 5K, 10K, and half marathon distances. Participants run through scenic redwood and pine forests along the San Andreas Trail, experiencing breathtaking single-track trails and challenging ascents to peaks with..

Run for Amma is an annual trail running event held at Skyline Ridge Open Space Preserve near Los Gatos, California. The race offers three distance options: 10K, 30K, and 50K, featuring challenging elevation gains of approximately 980, 3,629, and 5,266 feet respectively. The course showcases scenic t..

The Calero Trail Run - Spring is a trail running event held at Calero County Park in San Jose, California, featuring multiple race distances including a Kids Run, 5K, 10K, 15K, half marathon, 25K, marathon, and 50K. The course offers challenging single tracks, hills, dirt paths, and scenic vistas, m..

The 2025 Lake Chabot Trail Challenge features a Half Marathon and a 5K run, taking place in Castro Valley, California. This annual event, now in its 41st year, is popular among trail runners and offers scenic views of Lake Chabot, Mt. Diablo, and the San Francisco Bay.The Half Marathon course is a h..