Brush up on your knowledge of Yellowstone's geography with this interactive version of National Geographic's Trails Illustrated map Yellowstone National Park MapPlanning a Yellowstone trip?

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.

Yellowstone Caldera Chronicles is a weekly column written ... People visit Yellowstone National Park every year to observe its wildlife and vast array of hydrothermal features.

The Yellowstone supervolcano last erupted 640,000 years ago, according to National Geographic, creating a caldera that ...