Borah Peak

Borah Peak, also called Mount Borah, is Idaho’s highest mountain, rising to 12,662 feet (3,859 meters) in the Lost River Range.

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Mount Borah climbing routes: Established routes ascend Borah Peak, including the standard route over Chickenout Ridge. The standard ascent crosses exposed terrain and the narrow Chickenout Ridge.
Mount Borah summit: The 12,662-foot (3,859-meter) highest point of Borah Peak in Idaho. Its elevation makes it the state’s high point.
Mountain: A natural landform that rises prominently above surrounding terrain. Borah Peak is a high mountain with a distinct summit above the surrounding ranges.
Borah Peak geology: The rock, uplift, and fault processes that shaped Borah Peak in Idaho’s Lost River Range. Its geology connects the summit to the range’s active tectonic history.
Chickenout Ridge: A narrow, exposed ridge on Borah Peak’s standard climbing route. This ridge is the route’s most notable scrambling section and a common turnaround point.
Lost River fault: A major active normal fault along the western side of Idaho’s Lost River Range. Its movement produced the 1983 earthquake and uplifted terrain near Borah Peak.
Peak bagging: The pursuit of climbing a list of specified mountain summits. Borah Peak is a frequent objective for Idaho peak-baggers.
Basin and Range Province: A vast western North American region of alternating mountain ranges and basins formed largely by crustal extension. The Lost River Range is part of this broader tectonically extended region.
Borah Peak earthquake: A magnitude 6.9 earthquake that struck central Idaho on October 28, 1983. The earthquake caused a large landslide on Borah Peak’s west side.
Mount Borah landslide: A large earthquake-triggered landslide on Borah Peak’s west side in 1983. It is the mountain’s most visible scar from the 1983 earthquake.