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 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.
Many US 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 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