Fall River County is in Black Hills & Badlands South Dakota. Of the 66 counties in the Mount Rushmore State, 1,749-square-mile Fall River County ranks 12th by size. The total value of roughly 2,000 acres of recreational land and property recently listed for sale in Fall River County, South Dakota, was about $10 million. The average price of recreational acreage for sale in Fall River County was $1 million. 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.