When I was in my early teens, I was in the very beginning of all my substance abuse issues, I spent three months in an outward bound based setup. Three weeks of that three months were spent cross country skiing through Glacier National Park (I got to take Going To The Sun Road) I was in Glacier National Park, New Years Eve 1995. I had frost nip on my toes, I remember lying on my sled, looking up, and watching the Aurora glimmer while they pulled my boots off and shoved my feet against someone's warmed body to help warm me up.
It's the only time I've ever seen it except on video now. I remember laying there and just watching, in amazement.
I'm jealous of those who get to experience it again. It's a wonder of the world we inhabit, some folks will live an entire lifetime and never get to experience.