Found a great route from Walla Walla to Palouse Falls - a wide open sweeping turns 85+ mph rip through wheat fields to the Snake River and Falls. Great pavement, my father in law said it best "that road had a great rhythm" My wifes cousin found out that a HD soft tail gets a little wobbly at 85+. We passed no other cars on the route. If you want tight twisties this is not the road.
The Falls is great also, had a good cheeseburger in Starbuck.