Yellowstone National Park Report
Mountain goats ( Oreamnos americanus) are indigenous to western North America but are not native to the Greater Yellowstone Ecosystem. Recent introductions of mountain goats at several sites in National Forests surrounding Yellowstone and Grand Teton National Parks have brought them to the area. The introductions have been successful and goat populations are increasing. Goats are now reported to be in most mountain ranges surrounding the Parks and occasional sightings are reported within the Parks.
Laundre, John W.
"Status, Distribution, and Management of Mountain Goats in the Greater Yellowstone Ecosystem,"
University of Wyoming National Park Service Research Center Annual Report: Vol. 12
, Article 33.
Available at: http://repository.uwyo.edu/uwnpsrc_reports/vol12/iss1/33