BIG BELT MOUNTAINS

segment of the northern Rocky Mountains, paralleling the eastern bank of the Missouri River for about 80 mi (129 km) in west central Montana, U.S. Mt. Edith (9,504 ft ) is the highest point. Lying within a division of the Helena National Forest, the area was the scene of much gold prospecting in the late 1860s. A prominent limestone belt encircles the mountains, hence their name.