The snowcapped peak of Mount Rainier, which towers 4.3 kilometers (2.7 miles) above sea level in Washington state, has not produced a significant volcanic eruption in the past 1,000 years.

One of the world’s oldest national parks, Mount Rainier became part of the federal ... one of the world’s most active volcanoes. The Sicily, Italy, volcano is almost constantly in a state ...

On a clear sunny day in the Seattle/Tacoma area of Washington State, the locals often remark “The Mountain is out.” Gaze ...

It shows the underground plumbing system that provides molten and partly molten rock to the magma chamber beneath the Mount Rainier volcano in Washington state. The scale at left is miles depth.

The National Park Service is kicking off its National Park Week with free admission to its sites on Saturday. Here's what you ...

Majestic Mount Rainier is the highest peak in the Cascade Range and an active volcano with more glaciers than any other mountain in the United States. Just an hour's drive from Seattle, the park's ...

The caves form as heat rises from the volcano’s depths and melts the base of the ice cap that fills Rainier’s twin craters. (See diagram below.) More than 5,000 climbers trudge across those craters ...

On Aug. 12 the group flew to Seattle and set up camp at Cougar Rock campground in Rainier National Park the following day. On Aug. 14 they started their 78-hour trip at 10 a.m. The group chose to ...

One of the world’s oldest national parks, Mount Rainier became part of the federal ... one of the world’s most active volcanoes. The Sicily, Italy, volcano is almost constantly in a state ...