The bulge first appeared in 1996 and has now returned, but Yellowstone Volcano Observatory says there's no cause for alarm.

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 ...

Colorado might be home to some of the most iconic mountain ranges in the U.S., but ignore the Cowboy State at your peril.

'The awe-inspiring moment the Old Faithful geyser erupted was caught on camera by Candice White on July 8, 2020. The cone ...

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

The scheme — reminiscent of "Catch Me If You Can," the movie starring Leonardo DiCaprio — lasted four years, U.S. prosecutors ...

Despite his long, athletic legs, Powell High School Principal Tim Wormald was no match for 307 Health’s Dr. Mike Tracy while on a summer wilderness hike.

Summer at Yellowstone National Park usually means gridlocked traffic and booked-up lodges. A winter trip takes effort, but ...

Located in Mineral, California, about a four-hour drive northeast of San Francisco, Lassen Volcanic National Park also ...