The Missouri River Valley outlines the journey of the Missouri River from its headwaters where the Madison, Jefferson and Gallatin Rivers flow together in Montana to its confluence with the Mississippi River in the State of Missouri. At 2,300 miles (3,700 km) long the valley drains one-sixth of the United States,[1] and is the longest river valley on the North American continent.[2][3] The valley in the Missouri River basin includes river bottoms and floodplains.
- ^ Beatte, B. and Dufur, B. (2007) The Katy Trail Nature Guide and River Valley Companion. Katy Trail. Retrieved 2/5/08.
- ^ The Missouri River Story - USGS Archived 2006-09-23 at the Wayback Machine. Retrieved 2/5/08.
- ^ "The Missouri River", Prairie Fire. Retrieved 2/5/08.
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