Williamson Butte is a summit located in Blaine County, Montana. It appears on the Williamson Butte USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 4,574.83 feet (1,394.41 m) above sea level. The nearest populated place is Sour Dough Flat (historical), approximately 3.0 miles to the WSW.