The Big Bend is a large meander of the Missouri River in South Dakota, now impounded by the Big Bend Dam, 7miles to its south, as part of Lake Sharpe.
The meander is about 22miles long and at its narrowest, its neck is about 3440feet wide. The land within the bend and on its right bank is part of the Lower Brule Indian Reservation, while the land on the left bank is part of the Crow Creek Indian Reservation.
The Lewis and Clark National Historic Trail passes through Big Bend.