The Snake River and the Tetons, photograph by Ansel Adams
Andrew Henry and William Ashley
organized the first large scale commercial fur expedition into the
Rocky Mountains, in 1822. Many of the young men who joined
"Ashley's One Hundred," including Jedidiah Smith, Jim Bridger, and
Thomas Fitzpatrick, would become legendary mountain men at the peak
of the fur trade. Andrew was the first to lead a band of
trappers into the Henry's Fork of the Snake, a country of
exceptional grandeur, where they built a trading post and fort.
An early woodcut depicting William Ashley, Andrew Henry, and the
"Ashley One Hundred" encountering the Yankton Sioux on the Upper
Missouri River.