Important Phone Numbers
| Mammoth Mountain | External | Internal |
| Main Switchboard (to dial an internal extension, or for directory assistance) | 934-2571 | |
| On Hill Emergency Hotline | 934-0611 | |
| Ski Patrol Main Lodge | 934-0676 | 3276 |
| Ski Patrol Canyon Lodge | 934-0776 | 3376 |
| Security | 934-0697 | 3297 |
| Host Office Main Lodge | 934-0736 | 3736 |
| Host Office Canyon Lodge | 934-0737 | 3737 |
| June Mountain | ||
| Mid-Mountain Chalet/Lodge (Guest Services Office) | 648-7733 | |
| Tamarack | ||
| Ski Center Ticket Office | 934-2442 ext. 8 | |
| USFS Tours Coordinator | ||
| Lawson Reif (USFS Visitors’ Center) | 914-1933 | |