The Beaver Dam Mountains are a 23 miles (37 km) long mountain range located mostly in extreme southwest Washington County, Utah, west of St. George, with the south of the range extending into the Arizona Strip. The range contains the Beaver Dam Mountains Wilderness which straddles the state's borders. The south of the range can be impressively seen from Interstate 15, as it traverses the corridor into Utah through the Virgin River Gorge, as the Virgin River exits the west of the Colorado Plateau.