Simpson Lake   Be the first to submit input for Simpson Lake. If you have info on Simpson Lake, Douglas County, South Dakota please submit it here to improve this web site.          These outdoors activities are available near Simpson Lake.   Lakes Near Simpson Lake: Red Lake, Charles Mix County, 14 miles away   Marinas On or Near Simpson Lake: Fort Randall Marina, Pickstown, 18 miles away   Hotels Near Simpson Lake: Econo Lodge Mitchell, Mitchell, 29 miles away Ramada Inn And Suites Conference Center, Mitchell, 30 miles away Holiday Inn Express Hotel & Suites MITCHELL, Mitchell, 31 miles away Best Western Motor Inn, Mitchell, 31 miles away Quality Inn Mitchell, Mitchell, 31 miles away