Lewis and Clark Lake is an impoundment on the Missouri River above Gavins Point Dam, near Yankton, South Dakota. It is on the border of South Dakota and Nebraska. The reservoir is approximately long, with a surface area of 31,000 acres (130 km²); it has a maximum depth of. It is the smallest of the Pick-Sloan Plan impoundments, and has been plagued with siltation problems. Lewis and Clark Lake (with Gavins Point Dam) is a very popular for camping as a regional tourist destination, having hosted over one million visitors per year.
