Elevation: 12,197 ft
Climbing information for Diamond Peak is found on page 308. This update includes a lot of photos as well as information on climbing the peak from the west. Dan Paulson provided a photo essay showing the entire east ridge route.
Diamond Peak is located in the Lemhi Mountain Range. The peak lies in the Caribou-Targhee National Forest, except for a portion of its west side, which lies in the Challis National Forest. Diamond Peak is the 4th tallest peak in the State of Idaho and the only 12er in the Lemhi Range. Also, Diamond Peak is one of three peaks in Idaho (the other being Borah Peak and He Devil) that has 5,000 feet or more of prominence. Diamond ranks 43 of 57 summits in the lower 48 states in this category.
Back in 1981, when I climbed the peak, nobody was talking about climbing all of the 12,000 Idaho peaks and Diamond was very seldom climbed. Since that time, Diamond has gained in popularity, especially among the 12ers, because of its straightforward eastern approach; proximity to cities on its eastern side of Idaho such as Idaho Falls, Rexburg, and Pocatello; and growth of outdoor recreation programs at BYU-Idaho and Idaho State University.
The peak’s east ridge is the standard route, and a classic line that should not be missed. A few photos from my 1981 climb of that route are provided directly below. Further down, you will find the entire route documented in a photo essay by Dan Paulson.
Please also see Larry Prescott’s excellent photo essay on the East Ridge Route.
USGS Topo: Diamond Peak
East Ridge Route, Class 3
This is the Standard Route. The top half of the route is a sustained Class 3 climb. Stay as close as possible to the ridge crest—as the terrain on both sides of the crest quickly becomes Class 5 terrain.
East Ridge Route Photo Essay
by climber and photographer, Dan Paulson
West Side Route, Class 3
Not many people climb the peak from the west because it involves a steep scree climb. Here is a west side route photo courtesy of Zach Vickery.
More Views of Diamond Peak
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