If you are a skier, snowboarder or snowshoer or snowmobile rider this is important to know. 60% of deaths in the snow are from tree wells and softer snow around trees

 The softer snow around trees causes 60% of deaths from snow immersion. 

If you know this you will give all trees a wide berth especially in deeper snow. Though you might get out of a tree well if it is 6 feet or less deep you won't get out if it is over 10 feet or more by yourself.