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Volcanoes of Oregon (61)

Bachelor | Bailey | Belknap | Big Bunchgrass | Black Butte | Black Crater | Blue Lake Crater | Boring Lava | Broken Top | Brown Mountain | Cappy Mountain | China Hat-East Butte | Cinnamon Butte | Cowhorn Mountain | Crater Lake | Cultus Mountain | Cupit Mary Mountain | Davis Lake | Defiance | Devils Garden | Diamond Craters | Diamond Peak | Fort Rock Volcanic Field | Four Craters | Four Craters Lava Field | Fuji Mountain | Goose Nest | Imagination Peak | Irish Mountain | Jackies Butte | Jefferson | Jordan Craters | Lava Butte | Lava Mountain | Lost Lake Butte | Maiden Peak | McLoughlin | Mount Hood | Mount Washington | Mountain Lakes | Newberry | North Sister | Olallie Butte | Pelican Butte | Quartz Mountain | Red Top Mountain | Saddle Butte | Sand Mountain | Scott Mountain | Silver Creek | South Sister | Sprague River Valley | Squaw Ridge | Taylor Butte | Thielsen | Three Fingered Jack | Three Sisters | Tumalo | Williamson Mountain | Wilson | Wuksi Butte-Twin Lakes
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Volcano list


(stratovolcano 2763 m / 9,065 ft)
Mount Bachelor (formerly known as Bachelor Butte) in central Oregaon is a symmetrical stratovolcano, which is part of a 25 km long volcanic chain SE of South Sister.
The chain is aligned N-S and consists of the main volcano of Mt Bachelor itself, cinder cones, small shield... [more]


(Shield 2551 m / 8369 ft)


(shield volcanoes 2095 m / 6,873 ft)
Belknap Crater volcano is located near McKenzie Pass, north of the Three Sisters volcanoes in Central Oregon. It is the center and source of one of the largest number of geologically recent eruptions in the Cascade Range. It was very active between about 3000 and 1500 years ago. ... [more]

Big Bunchgrass

(Pyroclastic cone 2024 m / 6640 ft)

Black Butte

(Stratovolcano 1962 m / 6437 ft)

Black Crater

(Shield(s) 2210 m / 7251 ft)

Blue Lake Crater

(stratovolcano 1230 m / 4,035 ft)
Blue Lake is a series of at least 3 overlapping explosion craters (maars), located along a NE trend slightly east of the crest of the Cascade Range. The best-known crater, Blue Lake Crater contains a blue lake (800m x 300m) and is probably the youngest. It formed by an eruption a... [more]

Boring Lava

(Volcanic field 1236 m / 4055 ft)

Broken Top

(stratovolcano 663 m / 2,175 ft )
Broken Top in the Three Sisters Wilderness, Oregon, is, as the name suggests, the heavily eroded top of a probably extinct stratovolcano. [more]

Brown Mountain

(Shield 2228 m / 7310 ft)

Cappy Mountain

(Stratovolcano 2253 m / 7392 ft)

China Hat-East Butte

(Lava dome(s) 2004 m / 6575 ft)

Cinnamon Butte

(cinder cones 1956 m / 6,417 ft)
Cinnamon Butte is one of a group of 3 young cinder cones long a WNW-ESE line immediately west of the Cascade crest and NE of Diamond Lake in Oregon, USA. The other two cones are Thirsty Point and Kelsay Point. [more]

Cowhorn Mountain

(Shield(s) 2336 m / 7664 ft)

Crater Lake

(caldera 2487 m / 8,159 feet)
Crater Lake in the southern Cascade Range of Oregon, USA, is one of the most beautiful calderas in the world. It formed by the collapse of a massive stratovolcano known as Mount Mazama about 6850 years ago. The caldera measures 8x10 km in diameter and is filled with a lake of up ... [more]

Cultus Mountain

(Shield 2060 m / 6759 ft)

Cupit Mary Mountain

(Shield 1879 m / 6165 ft)

Davis Lake

(volcanic field 2163 m / 7,096 ft)
Davis Lake area in Oregon, USA, is a volcanic field with 3 cinder cones and lava flows of three cinder cones and associated lava flows. [more]


(Shield 1512 m / 4961 ft)

Devils Garden

(volcanic field 1698 m / 5,571 ft)
Devils Garden volcanic field in central Oregon, east of the Cascade Range, is the NW-most of a group of 3 young basaltic lava fields SE of Newberry volcano. It covers 117 sq km and consists of fissure vents and lava flows. [more]

Diamond Craters

(volcanic field 1435 m / 4,708 ft)
Diamond Craters is a 60 sq km volcanic field in SE Oregon, 11 km east of highway 205 and 64 km (40 miles) southeast of the town of Burns. It consists of cinder cones, maars (explosion craters) and lava flows.
Diamond Craters were named after the Diamond Ranch, established i... [more]

Diamond Peak

(Shield 2665 m / 8743 ft)

Fort Rock Volcanic Field

(Maar(s) 1712 m / 5617 ft)

Four Craters

(volcanic field 1501 m / 4,924 ft)
The Four Craters lava field, along with Devils Garden and Squaw Ridge, is the SE-most of a group of 3 basaltic lava fields SE of Newberry volcano in the High Lava Plains of central Oregon.
The Four Craters lava field contains 4 spatter cones along a 4-km-long NW-SE-trendin... [more]

Four Craters Lava Field

(Volcanic field 1501 m / 4925 ft)

Fuji Mountain

(Shield(s) 2177 m / 7142 ft)

Goose Nest

(Shield 2213 m / 7260 ft)

Imagination Peak

(Pyroclastic cone 1986 m / 6516 ft)

Irish Mountain

(Shield 2101 m / 6893 ft)

Jackies Butte

(Volcanic field 1418 m / 4652 ft)


(stratovolcano 3199 m / 10,495 ft)
Mt Jefferson volcano, one of the lesser known Cascade volcanoes, is the second highest mountain in Oregon. Although it is deeply eroded and has probably not erupted for at least about 1000 years, it is still considered active. [more]

Jordan Craters

(volcanic field 1473 m / 4,833 ft)
Jordan Craters in SE Oregon is a field of well-preserved basaltic lava flows and scoria cones covering 250 sq km. The last eruption took place at Coffeepot Crater at the NW end of the lava field about 3200 years ago and produced a lava flow covering 75 square km and containing 1.... [more]

Lava Butte

(Shield(s) 1447 m / 4747 ft)

Lava Mountain

(Volcanic field 1711 m / 5614 ft)

Lost Lake Butte

(Shield 1362 m / 4469 ft)

Maiden Peak

(Shield(s) 2383 m / 7818 ft)


(Stratovolcano 2894 m / 9495 ft)

Mount Hood

(stratovolcano 3426 m / 11,240 ft)
Mt Hood 75 km ESE of Portland is Oregon's highest peak and one of the most prominent of the Cascades volcanoes. It is probably the only volcano in Oregon which has erupted in historic times (last confirmed activity in 1865-66).
Andesite-dacite lava domes form the glacially... [more]

Mount Washington

(shield volcano 2376 m / 7,794 ft)
Mount Washington is a composite volcano in the Cascade Range of Oregon. The mountain dates to the Late Pleistocene. However, it does have a line of basaltic andesite spatter cones on its northeast flank which are approximately 1,330 years old according to carbon dating. The main ... [more]

Mountain Lakes

(Volcanic field 2502 m / 8209 ft)


(shield volcano, caldera 2434 m / 7,985 ft)
Newberry volcano east of the Cascade Range in Oregon, is one of the largest volcanoes on the US mainland. It covers about 1600 km2 and contains a large caldera, Newberry Crater, that was created several 100,000 years ago by a series of devastating eruptions.
The volcano las... [more]

North Sister

(complex volcano 3074 m / 10,085 ft)
North Sister volcano, along with Middle and South Sister part of the Three Sisters Group in central Oregon Cascades. The group forms a prominent landmark in the Central Oregon Cascades.
North Sister is the glacially eroded remnant of a andesitic-dacitic stratovolcano, expos... [more]

Olallie Butte

(Shield(s) 2199 m / 7215 ft)

Pelican Butte

(Shield 2449 m / 8035 ft)

Quartz Mountain

(Lava dome 1885 m / 6184 ft)

Red Top Mountain

(Shield(s) 2118 m / 6949 ft)

Saddle Butte

(Volcanic field 1700 m / 5577 ft)

Sand Mountain

(cinder cones 1664 m / 5,459 ft)
Sand Mountain is a cluster of 23 cinder cones NW of Mt Washington, Oregon. The youngest eruption took place to form Lost Lake cinder cone at the north end of the chain about 2000 years ago. [more]

Scott Mountain

(Shield 1864 m / 6115 ft)

Silver Creek

(Volcanic field 1375 m / 4511 ft)

South Sister

(complex volcano 3157 m / 10,357 ft)
South Sister (also known as Charity) is the highest and youngest of the Three Sisters volcanic group in the central Cascades, Oregon. It dominates the landscape and is a popular destination for climbers and hikers. [more]

Sprague River Valley

(Shield(s) 1300 m / 4265 ft)

Squaw Ridge

(lava field, shield volcano )
The Squaw Ridge lava field, also known as the East lava field, together with Devils Garden and Four Craters is the middle of a group of 3 young basaltic fields located in the High Lava Plains SE of Newberry volcano. It forms a small shield volcano from which lava flows have flowe... [more]

Taylor Butte

(Shield 1775 m / 5823 ft)


(Shield 2799 m / 9183 ft)

Three Fingered Jack

(Shield(s) 2390 m / 7841 ft)

Three Sisters

(Complex volcano, cinder cones, shields, fissure vents 3159 m / 10364 ft)
The Three Sisters volcano group in Central Oregon consists of several vents and volcanic edifices including the stratocones North Sister, as well as the younger Middle Sister and South Sister, which forms its summit.
Volcanic activity occurred frequently from various vents... [more]


(Lava dome(s) 1955 m / 6414 ft)

Williamson Mountain

(Shield(s) 1921 m / 6302 ft)


(Shield(s) 1707 m / 5600 ft)

Wuksi Butte-Twin Lakes

(Volcanic field 1590 m / 5217 ft)
Volcano news
Thu, 3 Feb 2022, 00:26

Three Sisters (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 26 January-1 February 2022 (NEW)

A special statement was issued by USGS on 31 January noting an increased rate of uplift at Three Sisters during the previous few years. An area 20 km in diameter, centered 5 km W of South Sister, inflated up to 2.2 cm between June 2020 and August 2021, based on analysis of satellite data. GPS data indicated that the uplift had continued to the present. ... Read all
Tue, 1 Feb 2022, 00:54

Three Sisters volcano (Central Oregon, USA): elevated ground deformation

Three Sisters volcano region (image: CVO)
The Cascade Volcano Observatory's instruments (CVO) detected an increased rate of local ground deformation in the Three Sisters volcano group located in the central part of the Oregon Cascade Range. ... Read all
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