United States Geological Survey scientists have shared maps that show where ash would fall across the US if a Yellowstone ...

Yellowstone National Park's nearly 3,500 square miles seep slightly across state borders into Montana and Idaho, but its major attractions are contained in the northwest corner of Wyoming.

Also, keep in mind that gas stations are limited inside Yellowstone and GPS devices may provide incorrect directions, so you'll want to use an official Yellowstone map (available online or at the ...