A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park.

Scientists are monitoring a city of Chicago-sized swath of rising ground at the northern volcanic rim of the Yellowstone ...

A grizzly spotted out wandering in Yellowstone National Park on Monday might be up from hibernation incredibly early or awake ...

Did anyone else grow up in perpetual fear of any and all natural disasters? I don’t know if it was cartoons or what, but as a ...

A gray wolf was illegally shot and killed just north of Yellowstone National Park last month. According to wolf advocates, ...

The story of wolves in Yellowstone National Park is one of the most successful—and scrutinized—wildlife restoration projects ...

Pack in all of the fun to your vacation with this list of the best things to do in Yellowstone National Park! This incredible ...

Lassen Volcanic National Park, about a four-hour drive north of San Francisco, feels like a secret getaway.