check out my friends site, they are biking the great divide, some of it off road, the rockies, the andes, etc.
one of the three members, Goat, doesn't wear shoes, don't ask me how he does it... but the pictures of him standing around in many feet of snow, not to mention biking through a snow storm barefoot, lol, quite hilarious.. i'd imagine most of us here would have all kinds of hi tech specialty materials covering our appendages
www.ridingthespine.com is the site