Mammal

Mountain Goat

Oreamnos americanus
Mammal Fort Clatsop, Oregon (described from Native accounts and trade goods) New to Western Science
Mountain Goat

Photo: Diego Delso, CC BY-SA 3.0

Common Names
White Buffalo / Mountain Sheep
Habitat
Lemhi area
Conservation
Apparently secure
First Observed
1806-02-22
Observed At
Fort Clatsop, Oregon (described from Native accounts and trade goods)

Known only from skins and native reports until Clark “saw one at a distance.” Lewis described while at Fort Clatsop.

In the NPS atlas of species the expedition described

Mountain goat

Animal · recorded by Lewis and Clark

Known only from skins and native reports until Clark “saw one at a distance” in the Lemhi area. Lewis described while at Fort Clatsop.

From the NPS Lewis and Clark National Historic Trail Park Atlas, mirrored here on September 21, 2026. This copy is not authoritative; NPS remains the system of record. About the mirror

Journal References

15 journal entries mention Mountain Goat

Sep 5 1804
Missouri River near Niobrara River — Patrick Gass: September 5, 1804
...t three miles higher up, on the north side, a creek, called Goat creek. On the hills above this creek we saw some goats or antelopes, which the French called cabres...
Sep 14 1804
Missouri River near White River — Patrick Gass: September 14, 1804
...came to us here; had killed a hare. Captain Clarke killed a goat or antelope.
Sep 17 1804
Missouri River near White River — Patrick Gass: September 17, 1804
...teen common and two black-tailed deer, three buffaloe and a goat. The wild goat in this country differ from the common tame goat, and is supposed to be the real ant...
Sep 20 1804
Missouri River near Big Bend — Patrick Gass: September 20, 1804
...ain Clarke and the other man joined us. They had killed two goats and two deer. At 1 o'clock at night, the bank where we were stationed began to fall so much, that ...
Oct 18 1804
Missouri River approaching Cannonball River — Patrick Gass: October 18, 1804
...e, and all the hunters came in having killed six deer, four goats and a pelican.
Feb 25 1805
Fort Mandan, preparing for departure — Patrick Gass: February 25, 1805
...near the horns 3 and its ears are shorter than those of the goat: it alsore-— Y veer les the Ram in its horns, and im all the particular eons “a tours of its fo...
Apr 7 1805
John Ordway: April 7, 1805
... to go back to the States also Some curious animals such as Goat Skins & horns, a barking Squerrell Some Mountain Rams horns a prarie hen & badgers Some birds caule...
Apr 15 1805
Missouri River near Little Missouri — Patrick Gass: April 15, 1805
...n very well. Passed a large creek on the North side, called Goat-pen creek. We saw a number of buffaloe and two bears on the bank of the river. After going 23 miles...
May 20 1805
Missouri River near Musselshell River — John Ordway: May 20, 1805
as usal. one of the hunters or trapers caught a large beaver last night, about nine o. Clock A.M. we passed the mouth of a...
May 26 1805
Patrick Gass: May 26, 1805
... We passed two creeks this fore- * «The Ibex resembles the goat in the shape of its body : but differs in the horns which are much larger. ‘They are bent backwar...
May 27 1805
Missouri River, first view of Rocky Mountains — Patrick Gass: May 27, 1805
...near the horns ; and its ears are shorter than those of the goat: it also resembles the Ram in its horns, and in all the particular contours of its form. The horns ...
Jun 25 1805
Great Falls Portage — Joseph Whitehouse: June 25, 1805
...e river and had killed one buck Deer and a buck antelope or goat kind &c. Some Thunder and light Sprinkling of rain &c. If Pie] July 9% Tuesday 1805. a beautiful mo...
Jun 26 1805
Great Falls Portage — John Ordway: June 26, 1805
...at sun rise and proceeded on. the current Swift, we found a goat or antelopes Skin which Cap* Clark killed and left for us. we passed a redish clift of rocks on Sta...
Jun 29 1805
Great Falls Portage — Joseph Whitehouse: June 29, 1805
... usal and proceeded on. the current verry rapid. we found a goat Skin which Cap! Clarks party had killed and left on Shore. passed a yal- low or redish clift of roc...
Jun 30 1805
Great Falls Portage — Joseph Whitehouse: June 30, 1805
...te bear on an Island. Saw a nomber of otter. Saw a flock of goats or antelopes one of the hunters killed one of them. we Saw a Camp where Cap! Clark had Stayed one ...

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