
| Mammoth Hot Springs Hotel: Summer Accommodations In the early days, Yellowstone's visitors began their park exploration at Mammoth Hot Springs, named after the steaming limestone terraces just above the hotel area. Today, Mammoth Hot Springs Hotel offers a warm welcome to summer and winter visitors. Elk routinely graze outside the hotel around the parade grounds of what was once Fort Yellowstone. Mammoth Hot Springs Hotel is open mid May to Mid October. For Reservations call Xanterra Parks & Resorts: Phone: 307.344.7311 Fax: 307.344.7456 |