Black Butte, el. is the highest peak in the Gravelly Range in Madison County, Montana. The eastern base of the peak is less than from the Beaverhead-Deerlodge National Forest road #290 (Gravelly Range Road).
Black Butte is a remnant of what was once a volcanic cone. Due to its height, it is probably the third-highest volcanic peak in Montana, the second and first-highest being the laccoliths Lone Mountain and Koch Peak.