Ashtabula Lake Nearby historic Sibley Trail was used by pioneers moving west. Bowman-Haley Lake Located on a former Sioux hunting ground of treeless slopes and plains. The Corps of Engineers' largest lake, and one of six built to control recurrent flooding on the Missouri River. Sites of early Indian culture and of trading and Army posts are located in the area. One of six large lakes on the Missouri River.
Area contains numerous village sites of early Indian culture.
A visitor center contains exhibits and displays. From Sioux Falls, W on l-9O to Chamberlain, then N on SD 50. On the south fringe of the Black Hills. Visit nearby Mt. Rushmore, Custer State Park, and Wind Cave National Park. About 1 mi N of Hot Springs.