Question: The Missouri Rhineland is a geographical area located mostly in a valley that is how long?

Related documents: [0]  [DOC] 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 2300 mi long the valley drains one-sixth of the United States, and is the longest river valley on the North American continent. The valley in the Missouri River basin includes river bottoms and floodplains. [END] 
[1]  [DOC] The Missouri Rhineland is a geographical area of Missouri that extends from west of St. Louis to slightly east of Jefferson City, located mostly in the Missouri River Valley on both sides of the river. It is named for its similarities to the Rhineland region in central Europe, a wine growing area around the Rhine river and the German-Americans who determined that this part of Missouri would be good for grape growing. The soils of the Missouri River Valley and surrounding areas are mainly rocky residual soils, which are excellent for viticulture (growing of grapes/vineyards) though poor for most agricultural purposes. These soils were left after the carbonate (mainly limestone) bedrock weathered away to impurities of clayey soil and chert fragments. Farther to the north, glacial deposits and wind-deposited loess, a silty soil also associated with the glaciers, are intermingled with the residual soils. [END]  
Answer: 2300 mi
2300 mi