Plains of the Mid-West Region, USA43.1N 96.6W
The Missouri River enters this image at the upper left, flowing south into Lake Oahe and then southeast towards the state of Missouri, where it joins the Mississippi River. The states it crosses here are part of the region of the USA known as the Mid-west.
The mid-western states are relatively flat, comprised either of plains or rolling and small hills. Prairies cover most of the states west of the Mississippi River with the exception of taiga-clad northern Minnesota and the Ozark Mountains of southern Missouri.
Rainfall decreases from east to west, resulting in different types of prairies, with the tallgrass prairie in the wetter eastern region, mixed-grass prairie in the central Great Plains, and shortgrass prairie towards the rain shadow of the Rockies.