Boulder Trail Runners
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.
Capser Windy City Striders
The purpose of the Casper Windy City Striders is to promote and encourage running related activities for runners of all ages and abilities.
Chaffee County Running Club
Regular group runs in and around Salida.