Us Army Corps of Engineers, South Dakota.
Oahe Dam, SD takes its name from the Oahe Indian Mission established among the Lakota Sioux Indians in 1874. Lake Oahe extends from Pierre, SD to Bismarck, ND. The lake is 231 miles long, and has 2,250 miles of shoreline. The 51 recreation areas located around the reservoir offer camping, picnicking, fishing, hunting, boating, water skiing, swimming, bird watching, hiking, biking, and photography opportunities.
From Pierre, 8 miles north on SD 1804.