The ground beneath Yellowstone National Park hides one of the world’s most powerful geological threats: a supervolcano ...

A Yellowstone National Park trail remained closed Wednesday after a possible grizzly bear attacked a hiker, leaving him with serious injuries. The 29-year-old man suffered injuries to his chest and ...

Yellowstone National Park late Sunday closed all roads south of Mammoth because of hazardous driving conditions and multiple weather-related vehicle incidents. The temporary closure went into effect ...