This is a list of explorers, trappers, guides, and other frontiersmen known as "Mountain Men". Mountain men are most associated with trapping for beaver from 1807 to the 1840s in the Rocky Mountains of the United States. Most moved on to other endeavors, but a few of them followed or adopted the mountain man life style into the 20th century. List References Joel Estes Colorado Territory Exploration 1833-1834 http://estescamping.com/joelcolorado.htm MEMOIRS OF ESTES PARK Mountain life as penciled by One of Joel's sons, Milton Estes http://www.estescamping.com/joel.htm Further reading DeVoto, Bernard. Across the Wide Missouri. New York: Houghton Mifflin Harcourt, 1947. External links Mountain Men Mountain Men Mountain Men Mountain Men