Phone Numbers
| Information | |
| General Visitor Information | 1-307-344-7381 |
| General Visitor Information (TDD) | 1-307-344-2386 |
| Road Construction Information | 1-307-344-7381 |
| Road Construction Information (up to the minute) | 1-307-344-2109 |
| Mammoth Hot Springs Visitor Center | 1-307-344-2263 |
| Old Faithful Visitor Center | 1-307-545-2750 |
| Canyon Visitor Center | 1-307-242-2550 |
| Norris Geyser Basin Museum | 1-307-344-2812 |
| Fishing Bridge Visitor Center | 1-307-242-2450 |
| Grant Visitor Center | 1-307-242-2650 |
| Mammoth Medical Clinic | 1-307-344-7965 |
| Old Faithful Medical Clinic | 1-307-545-7325 |
| Lake Hospital | 1-307-242-7241 |
| Emergencies | 911 |
| Park Reservations | |
| AmFac In-Park Lodging Reservations | 1-307-344-7311 |
| Advance Campground Reservations | 1-307-344-7381 |
| Old Faithful Dining Reservations | 1-307-545-4999 |
| Lake Hotel Dining Reservations | 1-307-242-3899 |
| Mammoth Hot Springs Dining Reservations | 1-307-344-5314 |
| Grant Village Dining Reservations | 1-307-242-3499 |
| Canyon Lodge Dining Reservations | 1-307-242-3999 |
| Park Stores | |
| Old Faithful Photo Shop | 1-307-545-7258 |
| Grant Village General Store | 1-307-242-7266 |
| Bridge Bay Marina Store | 1-307-242-7326 |
| Lake General Store | 1-307-242-7563 |
| Fishing Bridge General Store | 1-307-242-7200 |
| Canyon Photo Shop | 1-307-344-7757 |
| Tower Fall Store | 1-307-344-7786 |
| Roosevelt Store | 1-307-344-7779 |
| Mammoth General Store | 1-307-344-7702 |
| Yellowstone Nature Store | 1-307-344-7757 |
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