Twin Sisters is a summit located in Pennington County, South Dakota. It appears on the Pactola Dam USGS 7.5-minute topographic quadrangle. The nearest populated place is Sheridan (historical), approximately 3.0 miles to the S.
Pennington County · South Dakota
Twin Sisters is a summit located in Pennington County, South Dakota. It appears on the Pactola Dam USGS 7.5-minute topographic quadrangle. The nearest populated place is Sheridan (historical), approximately 3.0 miles to the S.