The Mississippi River flows into the Gulf of Mexico from its source at Lake Itasca, Minnesota. As the third longest river in the North American continent, the Mississippi River flows a total length of 2,350 miles through the center of the United States.
The exact length of the Mississippi River may vary year to year due to erosion or soil deposition. At its narrowest at Lake Itasca, the Mississippi River stretches between 20 and 30 feet. At its widest at Lake Winnibigoshish, the river stretches over 11 miles wide. According to reports by the Environmental Protection Agency, as of 2014, more than 50 cities in the United States used the Mississippi River as their main water supply.