The video was taken between Antelope, OR and Shaniko, OR - a distance of 7.9 miles. Part of that (I'm guessing ~1/2) is on top of a plateau and pretty straight. This video was the one of several shot on my son's video camera. He uploaded this one first because of the time it has been taking to convert his recordings to something compatible with YouTube as well as fit their time limits since this one is pretty short. Even better than this section was the section between Fossil, OR & Antelope - ~25.5 miles. (Do a Yahoo or Google Maps seach of these towns - be sure terrain shows - and you can see what I'm talking about).
There were plenty of others like these every day of our trip! I hope he gets some more videos up to share soon.