The two rivers that in the United States that make up the longest river system in north America are the Missouri and Mississippi river.
Missouri and Mississippi
Mississippi-MissouriMackenzieYukon
The Mississippi River.
Mississippi-MissouriMackenzieYukon
Missouri river and Mississippi river
Missouri river and Mississippi river
They are the longest rivers in each continents Africa, North America and South America.
They are the longest rivers in each continents Africa, North America and South America. Correction: The Missouri River is the longest river in the U.S.
Mississipi-Missouri
Mississippi
The Mississippi river is the largest and the longest river in the U.S and North America.