Big Sky is a ski resort that a TV anchor drew onto a cattle ranch. Chet Huntley, who co-anchored NBC's evening news, turned the land into a mountain, and the resort opened in December 1973 with a gondola and two chairlifts on the east face of Lone Mountain. Boyne Resorts bought it in 1976, and in 2013 it merged with its neighbor Moonlight Basin. The town around it is an unincorporated community of about 3,600 people, 45 miles by road from Bozeman, with no real downtown and no street you stroll for its own sake.
That's the honest pitch. Big Sky is for people who come to ski and who like to see few other people doing it. The mountain has 5,850 acres, about 400 inches of snow in an average year according to the resort, and a half-steep, half-gentle split that lets a group of mixed levels spend the day apart and meet for lunch. Five days works because the mountain has four distinct personalities, and because Yellowstone's northwest corner is only 15 miles from town. The park in winter is a different, quieter place, and you reach most of it on a snowcoach, not by car.
The plan runs Monday to Friday: the Mountain Village and the Bowl on Monday, Andesite Mountain on Tuesday, Lone Peak and the tram on Wednesday, the Moonlight side on Thursday and a snowcoach day to Old Faithful on Friday. Start on a Monday and arrive on Sunday, because the two Ikon blackout weekends and the Christmas week are the crowded ones and Monday to Friday avoids the weekend queues. Details on travel in the country are on the United States page.