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

The following is a news release from Yellowstone National Park. MAMMOTH HOT SPRINGS, Wyo. — Starting this year, Yellowstone ...

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

New preliminary visitation numbers from the National Park Serviceshow Glacier and Yellowstone National Parks moving in different directions last year, despite ...

Millions of people head to Yellowstone National Park each year, making traffic through popular areas a major problem for the ...

A new study documents the complex interactions between cougars and gray wolves in Yellowstone National Park and finds their ...