The first reports of Yellowstone, in the early 1800s, described a place in the northwest corner of the Wyoming Territory where mud boiled, water spouted, and steam came out of the ground.

Charles Alderson and his wife settle in the Wyoming Territory, and form a lasting friendship with Thomas Jefferson "Windy" Gibson. Alderson's wife dies in childbirth, leaving him with an infant ...

May 24 -- Green River City, The ten-man crew pushes off on the Green River from Castle Rock in Wyoming Territory. May 30 -- The party passes safely through its first three canyons: Flaming Gorge ...

Jackson and Hayden documented the landscape and natural resources of the Wyoming Territory in support of U.S. expansion. We’re going to see exactly how the environment has changed. Re ...