San Lorenzo River Trail Run

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..

The Almaden Hills Trail Run - Summer is a challenging trail running event held at Almaden Quicksilver Park in the scenic Almaden Valley, San Jose, California. The course features a mix of 60% dirt roads and 40% single-track trails with significant elevation gains, offering runners beautiful views an..

The Santa Cruz Trail Run, hosted by Inside Trail Racing, takes place at Henry Cowell Redwoods State Park in Felton, California. This scenic event offers three distances: 10K, Half Marathon, and 30K, featuring challenging courses through giant redwoods, twisting single-track trails, dirt fire roads,..

Run-de-Vous is a multi-distance running event held at Harvey Bear Ranch Park in San Martin, California. Scheduled for August 29, 2025, it offers a variety of race options including a marathon, 50K, 50-mile, 100K, 100-mile, and a 4-person 50-mile relay. The course is a fast 2-mile loop set against sc..