The pass lies on the Montana-Idaho border on the Continental Divide, at an elevation of 7,684 feet (2,342 m) above sea level.

The pass is crossed by a road (Idaho State Highway 29 and Montana Secondary Highway 324) from Leadore, Idaho to Dillon, Montana.

Bannock Pass should not be confused with the similarly named Bannack Pass,[2] about 33 miles (53 km) to the southeast, which is also in the Beaverhead Mountains, on the Montana-Idaho border, and on the Continental Divide, and which has virtually the same elevation (7,679 feet [2,341 m]).

In order to keep the grades manageable, the railroad used a switchback on each side of the ridge and bored a tunnel under the summit somewhat east of the current highway crossing.

Media related to Bannock Pass at Wikimedia Commons