Apparently in Colorado you can go hiking completely in the buff today. I don't know about this, there is a time and place to be nude, but hiking might not be the best place or time to shed the clothes. I don't understand the want to do this? being naked in the hot sun, climbing or hiking up a hill/mountain just seems silly to do in the nude. the cops or park rangers may give you a fine if you are caught doing this, so you may want keep your business covered, and on the plus side it might prevent a sunburn where you never want to get a sunburn.