The Sweet Grass Hills are a small group of low mountains rising more than 3,000 feet above the surrounding plains southwest of Whitlash, Montana, in Liberty and Toole County, Montana. The tallest point in the hills is West Butte at 6,983 feet. Quite prominent in the local area, they are clearly visible from US Highway 2 to the south, I-15, and can sometimes be …The Sweet Grass Hills are a small group of low mountains rising more than 3,000 feet above the surrounding plains southwest of Whitlash, Montana, in Liberty and Toole County, Montana. The tallest point in the hills is West Butte at 6,983 feet. Quite prominent in the local area, they are clearly visible from US Highway 2 to the south, I-15, and can sometimes be seen as far North as the Crowsnest Highway near Medicine Hat in Alberta as well as from the West, near Glacier National Park and Browning, Montana. Visibility may vary depending on local air temperatures or heat domes that may increase or decrease the apparent height of the features. Other named peaks in the small group are Gold Butte, East Butte, and Mount Lebanon. The Sweet Grass Hills are an example of the island ranges that dot the central third portion of the state of Montana. These island ranges, completely surrounded by the 'sea' of plains and not geographically part of the Rocky Mountains to the west, are "biological hotspots", containing more species than the prairie below.