1810 - Andrew Henry reaches the Snake River

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.

Woodcut - Ashley

An early woodcut depicting William Ashley, Andrew Henry, and the "Ashley One Hundred" encountering the Yankton Sioux on the Upper Missouri River.