Located on the continental divide in the Fraser River Valley south of Mastedon Glacier. on the border of Jasper & Mount Robson parks, Alberta/BC border. Major headwaters Athabasca & Fraser rivers.
Latitude 52; 36; 30 Longitude 118; 20; 00, Topo map 83D/09
Named by Arthur O. Wheeler in 1922. Wheeler thought that the mountain resembled a mastodon (an extinct elephant-like animal that lived in what is now Canada). Official name.
First ascended in 1933 by Rex Gibson, R.C. Hind, W.J. Watson, E.L. WoolfJournal reference CAJ 22-68.