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.
From Durango to Silverton is fun too seems most in the mountains are not good and LOVE those guardrails. I was driving one going 40 with my butt cheeks tight then some work truck went by at 65, they’re used to it I guess.
