After scaring yourself silly on the Beartooth Pass, both ways, we come to what in my opinion is possibly the finest road anywhere on the planet. It's called the Chief Joseph Highway or the Dead Indian Highway and it has everything from twisty and perfectly cambered corners, lovely sweeping bands, views to die for in every direction which leave you speechless, all manner places to stop and just take it in and almost zero traffic as most people seem to bypass it.
I rode it way back in 2005 and remember being blown away by it so bigged it up to everyone on the trip. My memory hadn't failed me and it was as stunning as I remember and for a lot of people it was one of the highlights of the trip. Again, mere pictures cannot show what a fantastic place it is. If you are ever in this area on a bike, in a car or an RV, just make sure you get on it.