description Missouri Overview
The Missouri River is the longest river in the United States and the principal tributary of the Mississippi River. It flows for about 3,700 kilometers from the Rocky Mountains across the Great Plains, passing through or along several states before joining the Mississippi north of St. Louis. The river’s basin covers a large area of the central United States and supports navigation, irrigation, cities, and ecosystems.
help Missouri FAQ
Where does the Missouri River flow?
The Missouri River runs about 3,700 kilometers from the Rocky Mountains across the Great Plains. It joins the Mississippi River north of St. Louis.
Is the Missouri River longer than the Mississippi River?
By conventional river-length measurements, the Missouri is the longer river, although the Mississippi carries more water. The Missouri is also the principal tributary of the Mississippi.
Which states does the Missouri River pass through or border?
The river passes through or forms boundaries near Montana, North Dakota, South Dakota, Nebraska, Iowa, Kansas, and Missouri. Its route crosses much of the Great Plains.
Where does the Missouri meet the Mississippi?
The Missouri joins the Mississippi River in the St. Louis region, just north of the city. This junction makes it a major part of the larger Mississippi drainage system.
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