Bah. I no longer have any doubts wrt your hiking stamina. Sunscreen I dunno, having no awareness of whatever precautions you took this past week (in my own case, the results seem to be noticeable but minor peeling, but no significant discomfort to speak of).

I have managed never to have heard of Zion National Park, but I suppose that's an obvious place name; it is Utah, after all.