Colorado Runner - Colorado's running news, events and results source

The American Trail Running Association, ATRA, was formed in mid-1996 as a Colorado not for profit corporation to serve the trail and mountain running community.

The Boulder Road Runners was formed in 1979 to encourage and promote running, walking, and fitness-related activities for people of all ages and abilities, from the casual recreational runner to the serious competitor.

Happy Hour Run is EVERY Thursday at 5:30 pm: all year, all weather, all trails. You should go to this; it's best way to meet people and see what's up. The location changes every week and is announced on this List.