Another beautiful ride is from the East Entrance Of Yellow Stone National Park east to Cody, Wyoming. And while in the Yellow Stone area make sure you ride over Bear Tooth.
In Colorado from the town of Dinosaur go to the entrance of the Dinosaur National Monument and ride the 25 miles in to the end and then hike one mile out to the point where the Green and Yampa rivers converge, It is absolutely beautiful and well worth the ride in there. It says it is the best view of any national park, and I thinks it ranks right there with any I have seen.
Also the ride from Dinosaur to Rangely south to Loma Colorado on highway 139 is really a great ride much beauty and twisties.
Try riding from Laramie Wy, on hwy 130 west to Ryan Park, it is very high in the Medicine Bow and just one beautiful ride.
The most surprising ride I have had in many a moon is from Rock Springs, Wy, south on hwy 191 to Vernal, Utah. It has some of the most amazing Vistas you will see in the US. Long winding with spectacular views.
Next time you are up this direction try riding from Cody, Wy North on hwy 120 to hwy 296, The Chief Joseph Highway, and stop at Dead Indian Pass. The history alone is awe inspiring and what a fabulous view.
Get on it and ride it, some day you may not be able to.