The eastern face of the mountain rises over 1,500 ft (460 m) vertically and the easiest route on this section is rated class 4 by mountaineers. The rock is also primarily sedimentary and provides poor anchor points, which in turn is a contributing factor to the difficulty rating. Henry Stimson and two other explorers, including a Blackfeet Indian, climbed the difficult eastern face on September 8, 1892, and this is the first known ascent of the peak by white explorers.