I can't believe that Highway 550 "The Million Dollar Highway" in Colorado from Silverton to Ouray is not on the list? A couple of photos for consideration.

I've ridden it many, many times on dual sport/dirt bike motorcycles. Crazy but sometimes a group of us would kind of "race" down it back into Ouray where we were staying during a motorcycle charity ride put on by Wally Dallenbach sr. with lots of Indy car guys, crew members and motorcycle industry people. Crazy times.