We did it in reverse, but I do know the route, at least the one we rode. Our goal was to ride highway 20 from the Oregon Coast to Boston MA. That is what we did. It essentially took us from a little north of Eugene through Boise. There are some long stretches and a lot of the route is in high desert. The roads are pretty good. If you want an idea of the trip you can go to our blog site and check out the 2007 entries. Youll have to scroll down to the beginning of the trip, July.
http://www.ddlivestrong.blogspot.com