Fall River County is in Black Hills & Badlands South Dakota. Of the 66 counties in the Mount Rushmore State, Fall River County is 12th in terms of its size (1,749 square miles). The total value of almost 1,000 acres of recreational land recently listed for sale in South Dakota's Fall River County was almost $2 million. The average price of recreational acreage for sale in Fall River County was $456,580. Browse all recreational property for sale in South Dakota to find the recreational tract that suits your lifestyle needs, from hunting and fishing properties for the outdoor enthusiast to undeveloped acreage ready for future residential-property development.