⏵ State guide · 37 races

Trail Races in Colorado: The 37 Races Worth Training For

Colorado racing means altitude first, terrain second. Courses regularly run above 10,000 feet through the San Juans, the Sawatch Range, and the Front Range, with thin air and big vert deciding more races than technical footing does. Hardrock and Leadville are the household names, but the state is full of quieter high-mountain 50s and 100s built on the same math.