Home

Glacier Peak is the most remote of the five active volcanoes in Washington State, and more than a dozen glaciers descend its flanks, prompting its name.


Summary

The peak wasn't known by settlers to be a volcano until the 1850's, when Native Americans mentioned to naturalist George Gibbs that "another smaller peak to the north of Mount Rainier once smoked." Glacier Peak is not prominently visible from any major population center, and so its attractions, as well as its hazards, tend to be overlooked. Yet since the end of the most recent ice age, this volcano has produced some of the largest and most explosive eruptions in the conterminous United States. Within this time period, it has erupted multiple times during at least six separate episodes. Glacier Peak and Mount St. Helens are the only volcanoes in Washington State that have generated very large explosive eruptions in the past 15,000 years.

News

Date published: June 2, 2021

Status of (mostly) Washington's Volcanoes: Report to Emergency Managers 2020-2021

While most of the Cascade Range volcanoes are located in remote areas, volcanic processes like ashfall and lahars can put large populations at risk. Frequent communication and interactions among scientists and emergency managers will help prepare us for future hazards.

Find a U.S. Volcano