• A bull elk bugles in Yellowstone National Park


    National Park ID,MT,WY

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  • Craig Pass Closed for the Season; Mammoth to Norris Closed Sept. 14-30

    The road linking West Thumb and Old Faithful is closed for the season—traffic should detour through West Thumb, Lake, and Canyon. The road from Mammoth to Norris is closed for two weeks—traffic should detour over Dunraven Pass. More »


Pronghorn (Antilocapra americana) group
Pronghorn herd
The North American pronghorn (Antilocapra americana) is the surviving member of a group of animals that evolved in North America during the past 20 million years. It is not a true antelope, which is found in Africa and southeast Asia. The use of the term "antelope" seems to have originated when the first written description of the animal was made during the 1804–1806 Lewis and Clark Expedition. Learn more...

Quick Facts about Pronghorn in Yellowstone
  • Approximately 200 to 350 migratory animals in Yellowstone.
  • Can run for sustained sprints of 45 to 50 mph.
  • Average lifespan 7 to 10 years.
  • The herd winters between the North Entrance and Reese Creek, spends summer in Lamar Valley or near the North Entrance in Gardiner, Montana.
  • Both sexes have horns, males' horns are pronged.
  • Shed their horn sheath each year--the only horned animal known to do this.
Additional Resources

Did You Know?

Yellowstone Wolf.

There were no wolves in Yellowstone in 1994. The wolves that were reintroduced in 1995 and 1996 thrived and there are now over 300 of their descendents living in the Greater Yellowstone Area.