Missouri River

The Missouri River is the 1st longest river in the United States. It has a total length of 3,768 kilometers and is a tributary of the Mississippi River (also on this list). This enormous river drains almost one-sixth of North America's whole continent, and several smaller rivers and tributaries pour into it.

The river's headwaters originate in the Rocky Mountains of Montana, near the continental divide, at one of the highest spots on the continent. The waters then travel through North Dakota, South Dakota, along the border of Iowa and Nebraska, and finally through Missouri to the river's mouth at St. Charles. Because this is the country's longest and one of its major rivers, its national significance cannot be overstated. For thousands of years, it has functioned as a mode of transportation as well as a source of sustenance in the form of fish and wildlife that live along the river's banks. The river is also utilized for agriculture and as a supply of water for populations in the states that surround it.

Length: 3,768 Km