In Tucson, Mt. Lemmon can be quite challenging, but the pavement was horrid when I was last there as a student at the University Of Arizona some fifty years ago.
Still, it was fun in my 1976 Capri 2 S V-6 manual 'Black Cat' with just some pedestrian narrow Michelins on the factory steelies.
I don't know how many (if any?!?) times they have repaved it since then, nor how good a job they did with said resurfacing if they did