Name one of the two longest rivers in the U.S.

The Missouri River is one of the two longest rivers in the United States, stretching over 2,340 miles. It originates in the Rocky Mountains of Montana and flows eastward and southward eventually merging with the Mississippi River. This river plays a crucial role in the geography, ecology, and history of the regions it traverses, serving as an important waterway for transportation and commerce throughout American history.

In contrast, the other rivers listed do not measure up to the length of the Missouri. The Ohio River, while significant, is approximately 981 miles long; the Colorado River runs about 1,450 miles; and the Rio Grande is around 1,896 miles long. Therefore, the Missouri River stands out as one of the two longest rivers in the country, highlighting its importance both in terms of length and its impact on the states it flows through.