JSpin informed us about a year ago that the Glacier National Park name was somewhat of a misnomer as those mountains have been completely free of glaciers several times in the recent geologic past. Given altitude, temperatures and precipitation in those mountains relative to other areas of the West, this does not surprise me.
Not to take anything away from the Whitefish area. The 20 minutes of clear viewing I saw from Big Mountain in 2003 shows that it's an outstanding year round recreational area.