Big Hole Pass (el. ) is a high mountain pass on the Montana Idaho border approximately 8 miles due south of Montana State Highway 43 in the Beaverhead-Deerlodge National Forest, Beaverhead County, Montana and Salmon National Forest, Lemhi County, Idaho. This location should not be confused with a sign on Montana Highway 278 at the height of land west of Dillon, Montana that denotes the eastern entrance to the Big Hole valley.