I've never seen one while skiing, but I've seen them in the wild a bunch. They are quite common where i live. Had one stalk me and my two friends for like an hour once while out hiking, could see it on the other side of the valley but it never got close. One time was getting drunk out in the boonies and somebody heard something rustling in the bushes, and saw it move. He thought it was a coon or something, and was drunk, so grabbed a samurai sword we had in the truck and he started walking into the bush. He got about half way there when somebody was like "Oh shit.........that wasn't a raccoon, get the fuck back here." Turns out we had about 5 mountain lions inching towards us, a mother and four cubs who were pretty fucking big. OH SHIT ITS A LION GET IN THE CAR, we drove away, it was all good. But that guy nearly got fucked up.