Location: Near Pierre, S.D., River Mile 1,072.3
Surrounded by the rolling prairies of the Dakotas, Lake Oahe stretches for 230 miles from Pierre, South Dakota to Bismarck, North Dakota.
The Oahe name comes from the Oahe Mission established among the Lakota Sioux people in 1874, historically located about eight miles upstream from the dam. The word "Oahe" comes from the Lakota language meaning "a firm place to stand on."