It is located along the border between southeastern Idaho and southwestern Montana, in the Henrys Lake Mountains at an elevation of 7,072 feet (2,156 m) above sea level.

During the Nez Perce War in 1877, Chief Joseph's band of Nez Perce traversed the pass on August 22 while evading U.S. Cavalry forces under the command of General Oliver O. Howard.

The Nez Perce had just engaged the army in the Idaho Territory at the Battle of Camas Creek.

After entering Montana Territory, the Indians moved east up the Madison River into Yellowstone National Park.

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