if you think it was mostly filmed at the same places, just remember the movie is all east coast. It's kinda hard to find backcountry hits here, and the number of resorts in the east with parks worth filming at isn't exactly huge.
Off the top of my head, mt. snow, killy, loon, waterville, stratton, ski sundown, mountain creek are some of the mountains in the movie, and there's a lot of urban from different places.