<P> Parts of the river itself are designated for recreational or preservational use . The Missouri National Recreational River consists of portions of the Missouri downstream from Fort Randall and Gavins Point Dams that total 98 miles (158 km). These reaches exhibit islands, meanders, sandbars, underwater rocks, riffles, snags, and other once - common features of the lower river that have now disappeared under reservoirs or have been destroyed by channeling . About forty - five steamboat wrecks are scattered along these reaches of the river . </P> <P> Downstream from Great Falls, Montana, about 149 miles (240 km) of the river course through a rugged series of canyons and badlands known as the Missouri Breaks . This part of the river, designated a U.S. National Wild and Scenic River in 1976, flows within the Upper Missouri Breaks National Monument, a 375,000 - acre (1,520 km) preserve comprising steep cliffs, deep gorges, arid plains, badlands, archaeological sites, and whitewater rapids on the Missouri itself . The preserve includes a wide variety of plant and animal life; recreational activities include boating, rafting, hiking and wildlife observation . </P> <P> In north - central Montana, some 1,100,000 acres (4,500 km) along over 125 miles (201 km) of the Missouri River, centering on Fort Peck Lake, comprise the Charles M. Russell National Wildlife Refuge . The wildlife refuge consists of a native northern Great Plains ecosystem that has not been heavily affected by human development, except for the construction of Fort Peck Dam . Although there are few designated trails, the whole preserve is open to hiking and camping . </P> <P> Many U.S. national parks, such as Glacier National Park, Rocky Mountain National Park, Yellowstone National Park and Badlands National Park are, at least partially, in the watershed . Parts of other rivers in the basin are set aside for preservation and recreational use--notably the Niobrara National Scenic River, which is a 76 - mile (122 km) protected stretch of the Niobrara River, one of the Missouri's longest tributaries . The Missouri flows through or past many National Historic Landmarks, which include Three Forks of the Missouri, Fort Benton, Montana, Big Hidatsa Village Site, Fort Atkinson, Nebraska and Arrow Rock Historic District . </P>

River in the us that flows south to north