Out of the 6,564 streams that flow through the U.S. State of Minnesota, there are 114 streams that are at least 30 miles long. The second longest river in the United States, the Mississippi River, originates in Minnesota before flowing south to the Gulf of Mexico. The longest river entirely within the state of Minnesota is the Minnesota River. Other rivers over 200 miles long include the Red River of the North, Des Moines River, Cedar River, Wapsipinicon River, Little Sioux River, and Roseau River.