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
It drains into the Gulf of Mexico.
The Lambert Glacier in East Antarctica, is the longest glacier in Antarctica and the world. It is about 40 km wide and about 400 km long. It drains nearly 8% of the Antarctic Ice Sheet into the Amery Ice Shelf.