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
Stratovolcano
- -
Crater Lake, OR
Caldera
6,600 - 7,000 years ago probably extinct
Diamond Peak, OR
Shield volcano
100,000 years ago extinct
Glacier Peak, WA
Stratovolcano
200 - 300 years ago yes
Indian Heaven, WA
Volcanic field
8,300 years ago -
Meagre Mountain, BC
Stratovolcano
- -
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
Stratovolcano
late 1700s - early 1800s yes
Mount Bachelor, OR
Strato volcano on shield volcano
11,000 - 15,000 years ago probably extinct
Mount Garibaldi, BC
Stratovolcano
10,000 years ago probably extinct
Mount Hood, OR
Stratovolcano
about 1800-1805 yes
Mount Jefferson, OR
Stratovolcano
50,000 years ago extinct
Mount McLoughlin, OR
Shield volcano
700,000 years ago extinct
Mount Rainier, WA
Stratovolcano
1882 yes
a "decade volcano"
Mount St. Helens, WA
Stratovolcano
May 18, 1980
57 persons dead
yes
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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