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 system in 1899, shortly after its last eruption. Park status was the culmination of a long campaign by John ...

Monitoring stations around Mount Adams noted nine earthquakes ranging from magnitude 0.9 to 2.0 near the volcano between ...

ASHFORD, Wash. — Visitors flock to Mount Rainier for its iconic views but Saturday the park became a platform for a growing national movement. Dozens gathered as part of a nationwide day of ...