Which river is often cited as one of the two longest in the United States?

The Missouri River is often recognized as one of the two longest rivers in the United States, along with the Mississippi River. The Missouri River stretches approximately 2,341 miles, making it longer than numerous other rivers in the country. Its significance extends beyond mere length; it has played a vital role in the history and development of the American West, serving as a major transportation route for settlers and goods. The river flows through several states, starting in Montana and meandering through the Dakotas, Nebraska, Kansas, Missouri, and into the Mississippi River.

Recognizing this, it's important to contrast the Missouri with other rivers mentioned. The Hudson River, while significant, is not nearly as long and is primarily known for its historical and cultural importance in the New York area. The Rio Grande, which forms part of the border between the United States and Mexico, is also smaller in length compared to the Missouri. The Columbia River, significant for its economic impact and breathtaking scenery, does not match the length of the Missouri either. Thus, the Missouri River stands out prominently as one of the two longest rivers in the United States based on its substantial length and historical importance.