American Bank Address: 1700 Lone Mountain Trl, Big Sky, MT 59716 Phone: (406) 995-7111 Banks Other Businesses: First Security Bank at 78 Meadow Village Dr, Big Sky, MT 59716 Big Sky Western Bank at 55 Lone Peak Dr, Big Sky, MT 59716 Warren Miller Lodge at 1 Yellowstone Club Trl, Big Sky, MT 59716 Buck's T-4 Lodge at 46625 Gallatin Rd, Big Sky, MT 59716