There are websites hiking naked including http://hikingnakednetwork.com/ where there are profile pictures of the members and are their butts. There's also http://www.hikingnaked.com/ and an interesting hike recap of a nude hiker http://wanr.earthbiz.net/DCNudeHike.html. The author says "Despite a full frontal view of my genitals, fully exposed and bobbling as I approached them, I was much more aware and concerned of their responding body language than conscious of my own state of appearance"
I've never been hiking nude and don't think I'll start on June 21st either. I'm not sure my reaction if I saw a nude hiker. Embarrassment? Amusement? Admiration?
Have you ever hiked in the nude? I know there are nude races but I've never done one of those either. How about you?