Thanks for your replies! Got to spend almost 10 days above tree line this year hunting deer and observing their reaction to weather changes. On two occasions it snowed, one morning a couple inches before noon. We got to walk the mountain up and down that day and it seemed like the elk and deer had completely evacuated the high country before dawn. That evening, after the snow had melted, we found tracks heading right back up the mountain. I even saw two mountain goats that were WAYYY lower than I'd ever seen them before. I imagine that the animals would want to be as comfortable as we want to be... Does this seem in line with your observations?