What river is the longest in the United States? 🔊
The longest river in the United States is the Missouri River, which stretches approximately 2,341 miles (3,767 kilometers). Originating in Montana, it flows southeastward through several states, including North Dakota, South Dakota, Iowa, Kansas, and Missouri, before joining the Mississippi River. The Missouri River has played a crucial role in U.S. history, serving as a key exploration route and a vital resource for agriculture, commerce, and transportation.


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