Volcanoes of California

• Coso Volcanic Field--dormant
• Lassen Volcanic Center--dormant (1917 A.D.)
• Long Valley Caldera--dormant
  • Inyo Craters--dormant (~1350 A.D.)
  • Mono Craters--dormant (~1350 A.D.)
• Medicine Lake Volcano--dormant (~1000 A.D.)
• Mt. Shasta Volcano--dormant (1786 A.D.)

Volcanoes of Oregon

My Oregon Volcano pages are part of the Deschutes National Forest website 

• Belknap Volcanic Field - dormant (1,300 yrs ago)
• Broken Top - extinct
• Brown Mountain - extinct
• Davis/Hamner Flows - extinct
• Devils Garden Flows - extinct
• Diamond Craters - extinct
• Diamond Peak - extinct
• Forked Butte - extinct
• Fort Rock Basin Maar Field
  • Moffitt Butte - extinct
  • Hole-in-the-Ground - extinct
  • Fort Rock - extinct
  • Table Rock - extinct
  • Sand Rock - extinct
• Four Craters Flows - extinct
• Jordan Craters - extinct
• Lava Mountain Flows - extinct
• Mt. Bachelor Volcanic Chain - extinct
• Mt. Bailey - extinct
• Mt. Hood Volcano--dormant (1865 A.D.)
• Mt. Jefferson - extinct
• Mt. Mazama (Crater Lake) - dormant
• Mt. McLoughlin - dormant
• Mt. Thielsen - extinct
• Mt. Washington - extinct
• Newberry Volcano - dormant (1,300 yrs ago)
• Pelican Butte - extinct
• Saddle Butte Flows - extinct
• Sand Mountain Volcanic Field - dormant
• South Cinder Peak - extinct
• Three Fingered Jack - extinct
• Three Sisters
  • North Sister - extinct
  • Middle Sister - extinct
  • South Sister - dormant (1,900 yrs ago)
• Tumalo Volcanic Center - extinct

Volcanoes of Washington

• Glacier Peak Volcano--dormant
• Mt. Adams Volcano--dormant
• Mt. Baker Volcano--dormant (~1850 A.D.)
• Mt. Rainier Volcano--dormant
• Mt. St. Helens Volcano--active (1986 A.D.)

ACTIVE = reported eruption in last 5 years
active = eruption in last 50 years
dormant = likely to erupt again
extinct = not likely to erupt again