Just got back from a day hike in PA. I was only going 9.3 miles. It was clear that no one had been on the trail and the snow started out about a foot and a half deep. By the time I was half way done the snow depth had increased to 2 and a half foot deep. My progress slowed from 1.5 mph all the way down to 0.5 mph. Also, you had to use blazes to tell where the trail was (a questionable thing at best). Fortunately I had a map and found a way down the hill to a road or I might still be out there. I have been hiking the AT since 1969 and this was the first time I feared that I may not make it.