What are things that border the Great Plains
Check out Google Maps.
the rocky mountains and the mississippi river and deserts of the southwest. of course the prairie goes on up into Canada, but for us here in the states, the international border with Canada .
The Palo Duro Canyon located on Prairie Dog Town Fork borders the Great Plains. The Mississippi river borders it to the east and the Rocky Mountains border it to the west. Find more about these plains on http://library.ndsu.edu/exhibits/text/greatplains/text.html.