Redstone finds the origins of its name from the red shale in the area. The area around and east of Redstone, especially in the badlands of Big Muddy Creek, is cattle country. Redstone is just a few miles north of the vast Fort Peck Indian Reservation. The reservation is home to Sioux and Assinniboine and encompasses more than 2 million acres. Poplar Museum and Tribal Museum feature tribal history and artifacts.