• An aerial view of Old Faithful erupting taken from Observation Point with the Old Faithful Inn to the side.

    Yellowstone

    National Park ID,MT,WY

Grizzly Bears

A grizzly bear walks in front of a rocky out-cropping.
 

The Greater Yellowstone Ecosystem and northwest Montana are the only areas south of Canada that still have large grizzly bear (Ursus arctos horribilis) populations. Grizzly bears were federally listed in the lower 48 states as a threatened species in 1975 due to unsustainable levels of human-caused mortality, habitat loss, and significant habitat alteration. Grizzly bears may range over hundreds of square miles, and the potential for conflicts with human activities, especially when human food is present, will make the presence of a viable grizzly population a continuing challenge for its human neighbors in the Greater Yellowstone Ecosystem. Learn more…

 

Quick Facts about Grizzly Bears in Yellowstone

  • Approximately 150 with home ranges wholly or partially in park. As of 2011, 593 in Greater Yellowstone
  • Males weigh 200–700 pounds, females weigh 200–400 pounds; adults stand about 3.5 feet at the shoulder
  • May live 15–30 years
  • Grizzly bears are generally 11 to 2 times larger than black bears
  • Agile; can run up to 45 mph
  • Can climb trees but curved claws and weight make this difficult. Can also swim and run up and downhill
  • Considered true hibernators
 

Did You Know?

Bison in Yellowstone.

There are more people hurt by bison than by bears each year in Yellowstone. Park regulations state that visitors must stay at least 25 yards away from bison or elk and 100 yards away from bears.