Name one of the two longest rivers in the United States.

The Mississippi River is one of the two longest rivers in the United States, along with the Missouri River. The Mississippi River runs approximately 2,340 miles from its source at Lake Itasca in Minnesota to the Gulf of Mexico. It has also historically been a vital waterway for transportation, trade, and cultural exchange in the United States, contributing significantly to the economy and history of the nation.

In contrast, while the Missouri River is indeed the longest river in the U.S., it's important to note that the question specifically asks for one of the longest rivers rather than only the longest. The Mississippi has held a significant place in the geography and history of the country as well, making it a notable choice for this question. The other rivers listed, such as the Colorado and the Ohio, do not compare in length to these two major rivers.