Borah Peak, Mountain summit in Custer County, United States

Borah Peak is the highest summit in Idaho at 3,859 meters and sits within the Lost River Range. The mountain offers multiple climbing routes with varying levels of difficulty for different experience levels.

The peak stayed unnamed until surveyors found it higher than Hyndman Peak, then thought to be Idaho's highest. In February 1934 the U.S. Geological Survey named it for William Borah, Idaho's senior senator and dean of the Senate, an isolationist known as the "Lion of Idaho" who sought the Republican presidential nomination in 1936 and died in office in 1940.

Climbers from the region share a long tradition of attempting to reach the summit, with the southwestern approach being particularly well-known among mountain enthusiasts. The climbing community uses this place to test skills and connect with fellow mountaineers.

The route to the summit requires technical climbing skills and proper equipment because of the steep terrain. Visitors should prepare for physically demanding conditions and changing weather patterns.

A powerful earthquake in 1983 lifted the peak by about 30 centimeters while the nearby Lost River Valley dropped by about 2.4 meters. This geological event made the region an important site for earthquake research.