America's Biggest Alpine Skiing With over 5,500 acres of skiable terrain on and around Lone Peak, Moonlight Basin and Big Sky Resort team up to provide an experience like no other. Home of the largest amount of terrain in America, your days will be spent exploring 220 runs covering over 110 miles. Want vertical? How about 4,350 feet? Looking for great powder? With more than 400 inches annually, we have you covered. Throw in runs up to 6 miles long and sparse crowds, and you have the makings for a truly epic ski vacation!