San Lorenzo River Trail Run

The Mt Umunhum Ultras is a challenging trail running event held in San Jose, California, featuring multiple race distances including 50K, Trail Marathon, 30K, Half Marathon, 9 Mile, 10K, and 5K. The course traverses the scenic Santa Clara Valley, Sierra Azul Open Space Preserve, and Santa Cruz Mount..

The Skyline Ridge Trail Run, held in La Honda, California, offers two distances: a 50K ultramarathon and a 21K half marathon. The courses traverse the scenic Skyline Ridge, Russian Ridge, and surrounding open space preserves, featuring diverse terrain including narrow hiking trails, ranch roads, eve..

The Golden State Trail Run in Marina, CA, is a premier summer trail running event held at Fort Ord National Monument. Offering distances of 10K, Half Marathon, 35K, and 50K, the race features diverse terrain including smooth single-track trails, sandy hills, fire roads, rolling hills, and vibrant wi..

The Rancho Hills Trail Run - Summer is a challenging trail running event held in the scenic Rancho Cañada del Oro Open Space Preserve near Morgan Hill, California. The race offers multiple distances including 50K, trail marathon, 30K, half marathon, 10-mile, 8-mile, 10K, and 5K, catering to a wide r..

The Calero Hills Trail Fest is a trail running event held at Calero County Park in San Jose, California. It offers a variety of race distances including a marathon, 30K, half marathon, 10-mile, 10K, and 5K. The courses feature challenging ascents and descents through scenic old oak groves, single tr..

The Mount Madonna Challenge, held in Gilroy, California, is a historic trail running event featuring a half marathon, 10K, and 5K races. Known for its challenging elevation gains—2,828 feet for the half marathon, 1,532 feet for the 10K, and 843 feet for the 5K—the race courses offer a rigorous test..