Outdoors in the Pacific Northwest
Volcanic Hazards

This chart lists the volcanoes in the Pacific Northwest by name and location along with the most recent eruption and whether or not the volcano may erupt again.

Volcano Most recent eruption Will it erupt again?
Belknap, OR
Shield volcano
1,500 years ago extinct
Broken Top, OR
- -
Crater Lake, OR
6,600 - 7,000 years ago probably extinct
Diamond Peak, OR
Shield volcano
100,000 years ago extinct
Glacier Peak, WA
200 - 300 years ago yes
Indian Heaven, WA
Volcanic field
8,300 years ago -
Meagre Mountain, BC
- -
Mount Adams, WA
Compound stratovolcano
1,000 - 3,500 years ago yes
Mount Bailey, OR
Shield volcano
100,000 years ago extinct
Mount Baker, WA
late 1700s - early 1800s yes
Mount Bachelor, OR
Strato volcano on shield volcano
11,000 - 15,000 years ago probably extinct
Mount Garibaldi, BC
10,000 years ago probably extinct
Mount Hood, OR
about 1800-1805 yes
Mount Jefferson, OR
50,000 years ago extinct
Mount McLoughlin, OR
Shield volcano
700,000 years ago extinct
Mount Rainier, WA
1882 yes
a "decade volcano"
Mount St. Helens, WA
May 18, 1980
57 persons dead
Mount Thielsen, OR
Shield volcano
290,000 years ago extinct
Mount Washington, OR
Shield volcano
1,330 years ago extinct
Newberry Caldera, OR
Shield volcano
600 years ago yes
Three Fingered Jack, OR
Shield volcano
250,000 - 500,000 years ago extinct
Three Sisters, OR
Stratovolcano cluster
2,000 - 100,000 years ago probably extinct

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