Wyoming was a state in the northwestern region of the United States. It was the 10th largest in area, but the least in population. It was bordered by Montana to the North, South Dakota and Nebraska to the East, Colorado to the South, Utah to the southwest and Idaho to the West. Its capital was Cheyenne.

It was where Yellowstone National Park was located as Jackson Curtis and his family visited as well as the location of the Yellowstone Caldera. Later on, the Yellowstone Caldera erupts, completely destroying the entire park and its surrounding areas as an ash cloud begins 'swallowing' whatever was left of Wyoming and most of the continental United States. Presumably, after the 2012 apocalypse, there were no survivors in Wyoming.

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