The Mammoth Hotel is a pickup and drop-off point for Yellowstone Park Tour buses. Or lounge on one of the inside balconies and read a good book, write a letter or just watch people. It's made of 500 tons of rhyolite stone. When the hotel opened, it had 146 rooms and was equipped with running water, electricity and steam heat. Several of the older balcony rooms, which are larger suites and overlook the geyser basin in front of the inn, are so sought-after they're reserved two years in advance.
Rooms range from two single beds to two doubles.
Besides the grand formal dining room, the Old Faithful Inn houses a fast-food outlet, an ice cream counter, an espresso cart, a lounge and a gift shop. Nearby, is a gas station and general store. The park's tour buses pick up passengers at the inn. Inside the lodge itself are a gift shop and several dining options including a cafeteria, two snack shops and an espresso cart in the lounge. The rooms range from those with two singles to two double beds.