Denver Colfax Marathon

Denver Colfax Marathon is Denver's only marathon, held over two days in May. The event features a full marathon, half marathon, Urban 10 Miler, and marathon relay, making it accessible to runners of all levels. The course takes participants through iconic sites like Empower Field at Mile High and along scenic waterways. With its well-organized logistics and festive atmosphere, including a large post-race party with live music and food, this marathon is a must-do for those seeking a challenging y