Denver Colfax Marathon

The Denver Colfax Marathon is one of the largest and most iconic road races in the United States, held annually in Denver, Colorado. The event features a full marathon, half marathon, 5K, and relay options, drawing runners from across the country to tackle a scenic course that winds through Denver’s vibrant neighborhoods, historic avenues, and green parks, including stretches along the South Platte River and the famous Colfax Avenue corridor. Known for its community spirit, enthusiastic crowd support, and festival atmosphere at the finish line in Civic Center Park, the race is a highlight of Colorado’s running calendar.