Here is a link that I found, that shows some roadside pictures in my area. The last four pictures on this link are the ones near us. The fourth to last, is leaving Belle Fourche and heading north. It shows some of the open rangeland and hills in this country. The 3rd and 2nd to last are about the Crow Buttes, which are real near me here. The last one is as you break over Sand Hill, and the view of Buffalo. These don't do justice to the country, but give an idea of the area.
Link: http://www.milebymile.com/main/United_States/South_Dakota/highway_photos_225.html