There are so many great roads in Colorado to ride. Highway 141 south of Grand Junction just could be the best ride in Colorado and there is a world class car musem in Gateway that should not be missed and there is a great place stay in a very nice motel. Independence pass into Aspen and then over McClure into Paonia on your way to higway 141. Trail Ridge road in Rocky Mountain National Park is an incredible ride even though you will encounter tourists and traffic. Cameron Pass north of Ft. Collins into North Park area on up into Laramie Wyoming and over the Snowy River Range is another great ride. Red Mountain pass on the Million Dollar Highway from Durango to Ridgeway is another great ride and will make you wish there were more guardrails.
Good riding to you. Enjoy Colorado.