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Volcano Type: Stratovolcano Composition: Andesite Most Recent Eruption: 6,700 Years Ago Threat Potential: High Glacier Peak

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Volcano Type: Stratovolcano Composition: Andesite Most Recent Eruption: 6,700 Years Ago Threat Potential: High Glacier Peak High to Very High Threat Potential Low to Very Low Threat Potential WASHINGTON Mount Jefferson Mount Baker Belknap Glacier Peak Black Butte Crater Lava Field Mount Rainier Blue Lake Crater Mount St. Helens Cinnamon Butte Mount Adams Craters of the Moon Volcanic Field OREGON Davis Lake Volcanic Field Mount Hood Devils Garden Lava Field Three Sisters Diamond Craters Volcanic Field Newberry Volcano Four Craters Lava Field Crater Lake Hell's Half Acre Lava Field CALIFORNIA Indian Heaven Volcanic Field Medicine Lake Volcanno Jordan Craters Volcanic Field Mount Shasta Lava Mountain Lava Field Lassen Peak Sand Mountain Volcanic Field Moderate Threat Potential Wapi Lava Field Mount Bachelor West Crater Volcanic Field Mount Baker Location: Washington, Whatcom County Latitude: 48.777° N Longitude: 121.813° W Elevation: 3,286 (m) 10,781 (f) Volcano type: Stratovolcano Composition: Andesite Most recent eruption: 6,700 years ago Threat Potential: High Glacier Peak Location: Washington, Snohomish County Latitude: 48.112° N Longitude: 121.113° W Elevation: 3,213 (m) 10,541 (f) Volcano type: Stratovolcano Composition: Dacite Most recent eruption: 1,100 years ago Threat Potential: High * Mount Rainier Location: Washington, Pierce County Latitude: 46.853° N Longitude: 121.76° W Elevation: 4,392 (m) 14,410 (f) Volcano type: Stratovolcano Composition: Andesite to Dacite Most recent eruption: ∼1,000 years ago Nearby towns: Orting, Seattle, Tacoma, Yakima Threat Potential: High Mount St. Helens Location: Washington, Skamania County Latitude: 46.2° N Longitude: 122.18° W Elevation: 2,549 (m) 8,363 (f) Volcano type: Stratovolcano Composition: Basalt to Rhyodacite Most recent eruption: 1980, 2004-2008 Nearby towns: Castle Rock, WA; Olympia, WA; Vancouver, WA; Yakima, WA; Portland, OR Threat Potential: High Mount-Adams Location: Washington, Klickitat County Latitude: 46.206° N Longitude: 121.49° W Elevation: 3,742 (m) 12,277 (f) Volcano type: Stratovolcano Composition: Basalt to Andesite Most recent eruption: 3,800 years ago Threat Potential: High Mount Hood Location: Oregon, Clackamas/Hood River Counties Latitude: 45.374° N Longitude: 121.695° W Elevation: 3,426 (m) 11,240 (f) Volcano type: Stratovolcano Composition: Andesite to Dacite Most recent eruption: 1865 AD Threat Potential: High Three Sisters Location: Oregon, Lane County Latitude: 44.103° N Longitude: 121.768° W Elevation: 3,157 (m) 10,358 (f) Volcano type: Complex volcano Composition: Andesite to Rhyolite Most recent eruption: 2,000 years ago Threat Potential: High Newberry Location: Oregon; Deschutes, Klamath and Lake Counties Latitude: 43.722° N Longitude: 121.229° W Elevation: 2,434 (m) 7,986 (f) Volcano type: Shield-shaped Composition: Basalt to Rhyolite Most recent eruption: 1,300 years ago Nearby towns: Sunriver, Bend, LaPine, Redmond Threat Potential: High Crater Lake Location: Oregon, Klamath County Latitude: 42.93° N Longitude: 122.12° W Elevation: 2,487 (m) 8,159 (f) Volcano type: Caldera Composition: Basalt to Rhyolite Most recent eruption: 6,600 years ago Threat Potential: High Medicine Lake Location: California, Siskiyou & Modoc Counties Latitude: 41.611° N Longitude: 121.554° W Elevation: 2,412 (m) 7,913 (f) Volcano type: composite (red map area) Composition: basalt to rhyolite Most recent eruption: 950 years ago Nearby towns: Malin, Merrill, Tulelake, Klamath Falls (OR) Threat Potential: High Mount Shasta Location: California, Siskiyou County Latitude: 41.409° N Longitude: 122.193° W Elevation: 4,317 (m) 14,163 (f) Volcano type: Stratovolcano Composition: andesite, dacite Most recent eruption: 200- 300 years ago Nearby towns: Weed, Mount Shasta, Edgewood, Dunsmuir Threat Potential: High Lassen Volcanic Center Location: California, Shasta County Latitude: 40.492° N Longitude: 121.508° W Elevation: 3,187 (m) 10,456 (f) Volcano type: stratovolcano Composition: andesite, dacite Most recent eruption: 1917 Nearby towns: Mineral, Viola Threat Potential: High Mount Bachelor Location: Oregon, Deschutes County Latitude: 43.979° N Longitude: 121.688° W Elevation: 2,764 (m) 9,068 (f) Volcano type: Stratovolcano Composition: Basalt to Andesite Most recent eruption: About 9,500 years ago Threat Potential: Moderate Mount Jefferson Location: Oregon, Jefferson/Linn/Marion Counties Latitude: 44.674° N Longitude: 121.8° W Elevation: 3,199 (m) 10,495 (f) Volcano type: Stratovolcano Composition: Andesite to Dacite Most recent eruption: During last glaciation ~15,000 years ago Threat Potential: Low/Very Low Belknap Location: Oregon, Linn County Latitude: 44.285° N Longitude: 121.841° W Elevation: 2,095 (m) 6,873 (f) Volcano type: Shield volcano Composition: Basalt, Basaltic Andesite Most recent eruption: 1500 years ago Nearby towns: Sisters Threat Potential: Low/Very Low Black Butte Crater Lava Field Location: Idaho, Snake River Plain Latitude: 43.18° N Longitude: 114.35° W Elevation: 1,478 (m) 4,849 (f) Volcano type: Shield volcano Composition: Basalt Threat Potential: Low/Very Low Blue Lake Crater Location: Oregon, Jefferson County Latitude: 44.411° N Longitude: 121.774° W Elevation: 1,230 (m) 4,035 (f) Volcano type: Maar Composition: Basalt Most recent eruption: 1300 years ago Nearby towns: Sisters Threat Potential: Low/Very Low Cinnamon Butte Location: Oregon, Douglas County Latitude: 43.241° N Longitude: 122.108° W Elevation: 1,956 (m) 6,417 (f) Volcano type: Scoria cone Composition: Basalt Most recent eruption: between 7,780 and 15,000 years ago Threat Potential: Low/Very Low Craters of the Moon Volcanic Field Location: Idaho, Snake River Plain Latitude: 43.42° N Longitude: 113.5° W Elevation: 2,005 (m) 6,578 (f) Volcano type: Cinder cones Composition: Basalt Threat Potential: Low/Very Low Davis Lake Volcanic Field Location: Oregon, Deschutes County Latitude: 43.641° N Longitude: 121.818° W Elevation: 1,494 (m) 4,902 (f) Volcano type: Lava flows Composition: Andesite Most recent eruption: 5,300-5,600 years ago Nearby towns: Gilchrist, La Pine Threat Potential: Low/Very Low Devils Garden Lava Field Location: Oregon, Lake County Latitude: 43.512° N Longitude: 120.861° W Elevation: 1,698 (m) 5,571 (f) Volcano type: Volcanic field Composition: Basalt Most recent eruption: Holocene Nearby towns: La Pine, Gilchrist, Sunriver, Wagontire Threat Potential: Low/Very Low Diamond Craters Volcanic Field Location: Oregon, Harney County Latitude: 43.095° N Longitude: 118.785° W Elevation: 1,435 (m) 4,708 (f) Volcano type: Volcanic field Composition: Basalt Most recent eruption: 7,790 to 7,320 years ago Nearby towns: Diamond (8 mi), New Princeton (18 mi), Burns (50 mi) Threat Potential: Low/Very Low Four Craters Lava Field Location: Oregon, Lake County Latitude: 43.361° N Longitude: 120.669° W Elevation: 1,501 (m) 4,925 (f) Volcano type: Volcanic field Composition: Basalt Most recent eruption: 13,000 years ago Nearby towns: La Pine, Gilchrist, Sunriver, Wagontire Threat Potential: Low/Very Low Hell's Half Acre Lava Field Location: Idaho, Bonneville/Bingham Counties Latitude: 43.5° N Longitude: 112.45° W Elevation: 1,631 (m) 5,351 (f) Volcano type: Shield volcano Composition: Basalt Most recent eruption: 5,200 years ago Threat Potential: Low/Very Low Indian Heaven Volcanic Field Location: Washington, Skamania County Latitude: 45.93° N Longitude: 121.82° W Elevation: 1,806 (m) 5,925 (f) Volcano type: Shield volcanoes Composition: Basalt to Andesite Most recent eruption: 9,000 years ago Threat Potential: Low/Very Low Jordan Craters Volcanic Field Location: Oregon, Malheur County Latitude: 43.147° N Longitude: 117.46° W Elevation: 1,473 (m) 4,833 (f) Volcano type: Volcanic field Composition: Basalt Most recent eruption: 3,200 years ago Nearby towns: Jordan Valley Threat Potential: Low/Very Low Lava Mountain Lava Field Location: Oregon Latitude: 43.472° N Longitude: 120.754° W Elevation: 1,711 (m) 5,614 (f) Volcano type: Volcanic field Composition: Basalt Most recent eruption: 13,000 years ago Nearby towns: La Pine, Gilchrist, Sunriver, Wagontire Threat Potential: Low/Very Low Sand Mountain Volcanic Field Location: Oregon Latitude: 44.38° N Longitude: 121.93° W Elevation: 1,664 (m) 5,459 (f) Volcano type: Cinder cones Composition: Basalt, Basaltic Andesite Most recent eruption: About 2,000 years ago Threat Potential: Low/Very Low Wapi Lava Field Location: Idaho, Snake River Plain Latitude: 42.88° N Longitude: 113.22° W Elevation: 1,604 (m) 5,262 (f) Volcano type: Shield volcano Composition: Basalt Most recent eruption: 2,270 years ago Threat Potential: Low/Very Low West Crater Volcanic Field Location: Washington, Skamania County Latitude: 45.88° N Longitude: 122.08° W Elevation: 1,329 (m) 4,360 (f) Volcano type: Volcanic field Composition: Basalt to Andesite Threat Potential: Low/Very Low .
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