Tennis, golf, and rock climbing are all very nice, but the real reason to come to Big Sky is to ski. It's a huge hill, with more than 3,812 acres of terrain and 85 miles of trails. You can ski for nearly a vertical mile from the top of the tram at 11,150 feet elevation to the bottom of the Lone Moose lift, at 6,800 feet, the second-longest vertical drop of any U.S. resort. There is terrain here for everybody, with 60% for advanced and expert skiers, 26% for intermediate, and 14% beginner. Big Sky gets 400 inches of snowfall, offering plenty of powder days. There's an ambitious children's program, offering lessons for kids as young as 3, and day care for kids who don't want to ski. Full ski-rental packages are available. New in the winter is a zipline operated by the ski school.