The "Going to the Sun Road" in Glacier was really exciting and beautiful but the road we covered on this day gave it a run for it's money. Miles and miles of 8% grades. And then there was also Flaming Gorge National Recreation Area and the fantastic scenery there.
http://travelinglongdogs.blogspot.com/2015/08/a-wild-ride-through-wyoming-utah-and.html