While there are parts of Kansas and Nebraska that live up to their reputation for being flat, the landscape for much of each state consists of gently rolling hills. The general lack of trees and buildings opens up the sky, making the land seem flatter than it actually is. Southeastern Colorado, however, is flat. I stopped to take one last panorama just north of Wiley.
The flatness and lack of trees makes for good sky watching. As I recall from one of Dr. Chermack's atmospheric physics lectures, the horizon is about 26 miles away with good visibility. The clouds in this panorama (much larger photo) are the remains of the storm that I encountered in Garden City --at least 70-80 miles to the east.
From there it was a three-hour drive to Denver and the trip was done.