Nitro Trail

The Grizzly Peak Trail Run is an exciting running event taking place at Lake Anza in Tilden Regional Park, Berkeley, CA. Scheduled for May 10, 2025, it features multiple race distances including a 10K, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under...

The Muir Woods Marathon, Half Marathon, and 7 Mile trail runs take place annually at Stinson Beach, California, starting from the Stinson Beach Parking Lot. This scenic event features challenging courses that ascend from sea level into the dense, towering redwoods and oaks of Muir Woods, following t..

The Napa Wilderness Trail Runs, hosted by Bay Trailrunners at Skyline Wilderness Park in Napa, California, offer a variety of trail running events suitable for all levels. Distances include a challenging 40-mile "Elevation Beast," a 50K endurance race, a scenic 30K, a half marathon, and a 10K for be..

The Pacifica Foothills Trail Run, held at San Pedro Valley County Park in Pacifica, California, offers trail running distances of 10K, Half Marathon, and 30K. Set within 1,150 acres of coastal mountain terrain in the Santa Cruz Mountains' northern spur, the courses feature moderately technical dirt..

The Wildcat Half Marathon, held in El Sobrante, California, is a trail running event featuring a half marathon, 10K, and 5K distances. Set within Wildcat Canyon Regional Park, the race offers stunning 360-degree views of the Bay Area, including sights of San Francisco, the Golden Gate Bridge, Alcatr..

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..