Chino Hills Trail Run Series

The Orange Curtain Endurance Run takes place in Cerritos, California, featuring distances of 100K, 50K, 30K, marathon, 24-hour, 12-hour, 10K, and 6-hour events. The course is a mostly flat 10 km out-and-back loop along the San Gabriel River bike path, combining asphalt and dirt surfaces, repeated mu..

The Into the Wild OC Trail Run takes place at Fremont Canyon via Irvine Regional Park in Orange, California. The event features a challenging 17-mile (27k) single-loop course primarily on fire roads, with an elevation gain and loss of 3,820 feet. Runners have the option to complete a shorter out-and..

The Whiting Ranch Trail Races, held in Trabuco Canyon, California, offer a variety of distances including 6K, 10K, 13.2 miles (half marathon), and 30K. Set within the scenic Whiting Ranch Wilderness Park in Orange County, the courses feature challenging climbs, expansive views, and trails winding th..

The OC Trail Runners Group Run is a free, social, and non-competitive trail running event held in Newport Coast, California, at El Moro and Laguna Coast Wilderness Park. The run emphasizes enjoying the outdoors and camaraderie, making it welcoming for all levels. Each group run features a different..

The Red Rock Wilderness Trail Run is a 5K (3.4 miles) race held at the Red Rock Wilderness in Silverado, California, starting and finishing at the Limestone Canyon/Augustine Staging area. The course features a mix of fire roads and single-track trails with an elevation gain of 300 feet, offering a m..

The Mt. Baldy 5000 is a challenging 5K mountain race held on the slopes of Mt. Baldy Resort near Los Angeles.The 3.1-mile course features nearly all uphill terrain with about 1,500 feet of elevation gain, primarily on fire roads with good footing. Starting at 6,400 feet elevation, runners climb stee..