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Clinics / Medical Facilities
Yellowstone National Park

The Mammoth Clinic located at Mammoth Hot Springs, is the only medical facility that is Open Year Round. There are other clinics that are open during the tourist season at Lake and Old Faithful.

Yellowstone National Park Medical Clinics
Clinic Open Close Hours Days Phone
Mammoth 02 Jan/03 Jun Sat/Sun 8:30 am - 5:00 pm / 8:30 am - 1:00 pm Mon - Thu / Fri 307-344-7965
  04 Jun/24 Sep - 8:30 am - 5:00 pm All Week
  25 Sep/30 Dec Sat/Sun 8:30 am - 5:00 pm / 8:30 am - 1:00 pm Mon - Thu / Fri
  Year Round - No After Hour Calls  
Lake 18 May/14 Sep * - 8:30 am - 8:30 pm All Week 307-242-7241
  15 Sep/19 Sep   10:00 am - 6:30 pm All Week  
Old Faithful 14 May/14 Sep * - 7:00 am - 7:00 pm All Week 307-545-7325
  15 Sep - 01 Oct   8:30 am - 5:00 pm All Week  

Updated: April 9th, 2021

* On Call After Hours through 911

The Mammoth Clinic is “Closed” on the following Holidays:
January 1st / May 31st / November 24th, 25th, 26th / December 24th & 25th, 31st

For all in park Emergencies: Dial 911

Yellowstone National Park 2019 Clinic Opening, Closing and Hours ~ Medcor Image

Yellowstone National Park Clinic Map ~ Medcor Image

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