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

Altitude Multisport Club has members at all levels from novices to those who have competed repeatedly at Ironman's World Championship race in Kona, Hawaii. Nearly every weekend during June through September, you'll find our members racing anything from sprint distance races to local 10k runs or…

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.