Mount Madonna Challenge

Run by the Sea is an annual running event held at Wilder Ranch State Park in Santa Cruz, California. Scheduled for October 5, 2025, the race offers three distances: a 4K run/walk, a 12K run, and a half marathon. The courses primarily follow flat, packed dirt trails along the scenic coastal bluffs of..

The Mt. Umunhum Trail Conquest-Fall is a trail running event held at Almaden Quicksilver County Park in San Jose, California. The race offers multiple distances including a 5K, 7 Mile, Half Marathon, 30K, Trail Marathon, and 50K.The longer courses venture into the scenic Sierra Azul Open Space Prese..

The Quicksilver Trail Challenge, hosted by the Quicksilver Running Club in San Jose, California, is an annual trail running event held in late summer or early fall at Almaden Quicksilver County Park. It features a half marathon, a 10K race, and a free one-mile kids' fun run. The courses traverse sce..

ZombieRunner Halloween is held at Hellyer County Park (Buena Vista Pavilion) in San Jose, CA, along the Coyote Creek trail. The event features distances of 5K, 10K, Half Marathon, and Marathon, plus youth options: 5K for under 12, 5K and 10K for ages 13-17, and a free Kid's Run (6 and younger, 50 yd..

Almaden Hills Trail Run - Fall takes place in Almaden Quicksilver Park in San Jose, California. The event offers multiple distances: 50K, Trail Marathon, 30K, Half Marathon, 8 Mile, 10K, and 5K, appealing to a wide range of runners. The course combines 60% dirt roads and 40% single-track trails, and..

The Rancho Hills Trail Run - Fall is a challenging trail running event held at the Rancho Cañada del Oro Open Space Preserve in Morgan Hill, California. The race offers a variety of distances ranging from 5K to 50K, including 8-mile, 10-mile, half marathon, 30K, and trail marathon options. The cours..