Answer:
The Mississippi River and the Missouri River
Explanation:
The Missouri River is the longest river in the United States, stretching approximately 2,341 miles (3,767 kilometers) from its source in the Rocky Mountains of southwestern Montana to its confluence with the Mississippi River near St. Louis, Missouri.
The Mississippi River is the second longest river in the United States, flowing about 2,320 miles (3,734 kilometers) from its source at Lake Itasca in northern Minnesota to its mouth at the Gulf of Mexico.
