Here's what to know about the three states that cradle Yellowstone National Park, one of the most essential American experiences you should try when visiting the U.S. Yellowstone National Park ...

Grover Hot Springs State Park in California provides alpine scenery and hot springs in a peaceful atmosphere away from Yellowstone's busyness. Yellowstone, the oldest national park in the U.S., is ...

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.

A new study on the supervolcano percolating underneath Yellowstone National Park reaffirms it’s not about to blow and end humanity as we know it. It ...

The giant supervolcano that lies under Yellowstone National Park is cooling off in the west but staying hot in the northeast.

Montana is suing Yellowstone National Park over a plan to increase the number of bison in and around the park and establish ...

FILE - The iconic Old Faithful Geyser springs to life (every 90 minutes) in Yellowstone National Park's Upper Geyser Basin ... region of magma storage. Map showing extent of ashfall from eruptions.