I loved driving US 14A, but I have a Ram diesel truck with an exhaust brake. People with gas engines tend to like it less! It is steep for much longer uphill and downhill grades than US 550 between Ouray and Silverton, which I have driven more times than I can remember in the past 50+ years. But 14A also has wider lanes, guard rails, and even some shoulders.
And we also enjoy the Beartooth Highway (US 212) between Red Lodge and Cooke City (but only without the trailer!) and the Chief Joseph Highway between Cody and Cooke City.
