SEATTLE (Reuters) - Experts have mapped a huge magma reservoir below Mount Rainier in Washington state that begins melting deep in the Earth's mantle before pushing upwards to where it will eventually ...

Washington's epic Mount Rainier has long served as an icon on the horizon for major cities like Seattle. Up close, however, it's also the epicenter of one of America's most magnificent national parks.

Mount Rainier has lost glaciers due to the warming climate. Glacier melt threatens rivers, salmon habitats and hydropower across Washington state. South-facing glaciers without high-elevation ...

Out of the five peaks studied in Washington — Rainier, Liberty Cap, Colfax Peak, East Fury and Eldorado Peak — only Colfax and Liberty Cap now maintain a year-round layer of ice and snow. Researchers ...

Mount Rainier’s quiet, snowcapped profile hides a restless interior that has just rattled itself with more than a thousand tiny earthquakes, a reminder that one of the country’s most dangerous ...