Is it safe to assume that elevation would prevent Sunday River from even trying to compete in the spring?
As Chuckstar pointed out they have gone late. I seem to recall pictures of snow maybe even on July 1st when they blew a glacier on White Heat. It's not elevation that gives Killington an advantage, it's proximity to the NYC market that matters most. Plenty of places with geographic and elevation advantages over K, but they are too far from the city.