In case of an emergency, dial 911.
Medical services are available year-round (except some holidays) at the Mammoth Clinic (307-344-7965). During summer, medical services are offered at Lake Clinic (307-242-7241) and at Old Faithful Clinic (307-545-7325). All clinics are open to the public and are equipped for most medical emergencies as well as for routine care. Services include injury and illness treatment, x-rays, as well as some lab and pharmacy services. If in-patient care or advanced services are required, clinic staff can stabilize patients and arrange for transfer to hospitals outside the park.
U.S. Post Offices are located at Canyon Village, Grant Village, Lake Village, Mammoth Hot Springs, and Old Faithful. View our operating hours & seasons page for more information.
Service stations can be found at Canyon Village, Fishing Bridge, Grant Village, Mammoth Hot Springs, Old Faithful, and Tower Junction. All service stations offer 24-hour, year-round credit card fueling. View our operating hours & seasons page for more information.
The following businesses are authorized to provide RV repair in Yellowstone:
Mobile RV Tech: (406) 682-4100
Motorcoach Maintenance & Truck Repair, Inc: (406) 388-7448
Powell Lock provides locksmith services in Yellowstone.
Cell towers at Mammoth Hot Springs, West Yellowstone, Old Faithful, Grant Village, Lake Village, and Mount Washburn provide limited service to most developed areas and at the North and West entrances. During summer, the number of users can overwhelm cellular circuits resulting in an inability to send or receive calls, text, or use cellular data. Do not rely on cellular service in Yellowstone. Texting is usually the most effective means of communication in the park. As a courtesy to others, please silence your mobile device while enjoying Yellowstone’s natural features.
We do not maintain coverage maps, so check with your provider to verify coverage. Cellular service is available in most nearby communities and along some of the major highways leading to the park. However, areas without coverage exist throughout the region.
Free Wi-Fi is available at the Albright Visitor Center in Mammoth Hot Springs. Wireless internet access can be purchased at the Mammoth Hotel Lounge, the Old Faithful Snow Lodge, Lake Lodge Cafeteria, and Grant Village Lodge buildings. Connectivity is limited and may not be available at all times.
Satellite phones are a fairly reliable means of communication in Yellowstone: expect dropped calls and periodic lack of service when satellites are not in a position to transmit.
Check our Commercial Guided Tours page for additional lists of businesses authorized to provide services in the park, and be sure to explore what the vibrant communities outside the park have to offer.