The largest river in the United States is Missouri River. It flows for about 2,341 miles (3,768 km) from its source in the Rocky Mountains in Montana to its confluence with the Mississippi River near St. Louis, Missouri.
The second longest river in the US is the Mississippi River. It is the largest river in North America, flowing for about 2,348 miles (3,778 km) from its source at Lake Itasca in Minnesota to the Gulf of Mexico.
Wanderlust World