Up here that is always a danger when outside during cold weather and that does not necessarily have to be freezing either. One can overdress and bring that on as well as underdress for the length of time one is out.

Always pay attention to when feeling cold starts to be painful and warm up completely under shelter and then do not go back out if still sweaty. One can be sweaty and chilled at the same time. If you pass that point where the pain stops and you start to feel sleepy, get to warm shelter immediately and get warmed up and completely stable before you do anything else!

Also be aware that if the sleepiness continues for very long you will probably also get disoriented. DO NOT LET IT GET TO THAT POINT OR YOU MAY NOT BE ABLE TO FIND THE NECESSARY SHELTER EVEN IN PLACES YOU KNOW WELL! Back in shelter you will almost certainly feel the pain that disappeared return as you warm up and that can be agonizing. You will also be lucky not to lose fingers or toes, ears etc at that point from being frozen.

Being wet accelerates the problem; so dress in layers that can be removed, opened and reapplied as your activity level changes. Do not allow yourself to be soaked in sweat by overdressing for the activity level you are engaging in. Next to your body dress in wicking undergarments and breathable insulating layers, or carefully manage more traditional clothing which very often loses its insulating qualities dramatically when wet. Sweating heavily indicates overheating which can crash rapidly into hypothermia, if not promptly and carefully corrected and stabilized.

Winter sports carry some very important dangers. Be safe.