Across the East, major areas from West Virginia to Maine were operating by the end of last weekend, among them Snowshoe, Camelback, Jiminy Peak, Okemo, Killington, Mount Snow, Stowe, Bretton Woods, Loon, and Sunday River. Next to open: in Colorado, Beaver Creek is opening as scheduled on Nov. 26, while in British Columbia, Whistler will open on Nov. 26 also. Blackcomb follows the next day. \