I got my friend Mike to go ride with me and the pre-production EOS 7D I had over the Labor Day weekend. This was taken at about 10,000 feet. So just getting there was an effort. I was happy to discover that the 7D was smaller than I expected - about the same size as the 40D and 50D and not the 5D Mk II, as I had thought. That is good news for anyone who's going to pack it into the backcountry.