The Missouri River is longer, but may be considered a tributary to the Mississippi River, which drains much of the eastern interior of the US.
The Mississippi River, and its tributaries including the Missouri and Ohio Rivers. The Missouri River can be considered to be the longest interior river.
The Mississippi River.
Mississippi
The Mississippi River.
the mackenzie river
It drains nearly 40% of South America.
Mississsippi river
The Amazon River drains the largest rainforest in South America. It meanders nearly 4,000 miles before emptying into the Atlantic Ocean.
The Missouri River drains to the area of northwest of the Rockies. The Missouri River is 2565 miles long and is the longest river in the United States.
Mississippi
The Missouri River does not drain the entire United States, but it is one of the longest rivers in North America and serves as a major tributary to the Mississippi River. It flows through several states, including Montana, North Dakota, South Dakota, Nebraska, Iowa, Kansas, and Missouri, draining a significant portion of the Great Plains. Ultimately, the Missouri River contributes to the Mississippi River system, which drains into the Gulf of Mexico.
It drains into the Gulf of Mexico.