» BARC - Boulder HAM Radio Club    Information about testing sessions, membership, and the club's repeater.    http://www.qsl.net/w0dk/

» Estes Valley Amateur Radio Club    Provides a meeting schedule and a list of repeaters. Located in Estes Park.    http://www.evarc.org/

» Pikes Peak Radio Amateur Association    Features a message from the president, information about membership, meetings, training sessions, programs and Field Day. Located in Colorado Springs.    http://www.ppraa.org

» Rocky Mountain Ham Radio    Operates several repeaters in the Denver area. Includes repeater frequencies and APRS information.    http://www.rmham.org/