High Quality Content by WIKIPEDIA articles! In mountaineering terminology in the United States, a fourteener is a mountain that exceeds 14,000 feet (4,267.2 m) above mean sea level. The importance of fourteeners is greatest in Colorado, which has the majority of such peaks in North America. Climbing all of Colorado`s fourteeners is a popular pastime among peak baggers; another popular target is climbing all of the fourteeners in the contiguous United States. Various ski mountaineers have completed ski descents of all the Colorado fourteeners, and the first attempts are being made to complete ski descents of all U.S. fourteeners.