Upper Mississippi & Lower Missouri Rivers

Upper Mississippi and Lower Missouri Rivers:  the Upper Mississippi River extends from the mouth of the Ohio River to Minneapolis/St. Paul, Minnesota, Upper Mississippi River Miles 0 to 866 (866 total miles).  The Lower Missouri River extends from its mouth near St. Louis, Missouri to the mouth of the Niobrara River near Niobrara, Nebraska, Missouri River Miles 0 to 844 (844 total miles).