On a slightly disgusting side note, it has been interesting to see how the roadkill changes across the country. (Don't worry... I don't have pictures!) Up until halfway through Kansas and into Missouri, almost everything was small and furry and, now as it gets more humid, we are seeing more snakes and turtles and even an occasional armadillo.
In keeping with the state themes, I would have to say Colorado's theme is the turning point of the trip. Not just in terms of miles, but realizing that we will indeed be able to complete the trip on time. While Wyoming was the state that could have been worse, I think Kansas is the state that could have been better. (No offense, Holli!) After not having any problems with my bike the whole trip, I got a flat tire and a broken spoke in Kansas. Also, the wind was supposed to be at our backs across Kansas, but it never seemed to be.