Mississippi-Missouri

Longest River System

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U.S. Postal Commemorative, Jefferson National Expansion Memorial

St. Louis, Missouri

From the headwaters of the Missouri River, in the Rocky Mountains, to the great delta where the Mississippi River empties into the Gulf of Mexico, the Mississippi-Missouri river system stretches more than 3,700 miles.  Exact measurements are difficult to pinpoint..

http://www.nps.gov/miss/riverfacts.htm

http://en.wikipedia.org/wiki/Mississippi_River

http://en.wikipedia.org/wiki/Missouri_River

Wonders of America: Land of Superlatives Stamp Series@2005 United States Postal Service. All rights reserved. Used with Permission.

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Image courtesy of Jim Roberts, GVCC