Image 1 of 1
155 MORNING FOG ON THE MISSOURI
Missouri River, Nebraska-South Dakota Border A smoky haze of fog covers the rising sun on the Missouri River along the Nebraska/South Dakota border. Also known as the "Big Muddy," the Missouri River is comprised of islands, shifting sandbars, sloughs, and treacherous snags. Linked by Louis and Clark Lake, the upper 39-mile reach and the lower 59-mile reach along the Nebraska/South Dakota border combine to form one of the few segments of this once vast ecosystem that remains in a relatively natural state. Wildlife that rely on this section of the river include three endangered species: the least tern, piping plover, and pallid sturgeon. Nebraska - South Dakota Border.