Name Type Elevation (m) Elevation (ft) Last eruption date Last eruption VEI Location Boring Lava Field Volcanic field 1,236 4,055 Pleistocene 45°40′N 122°41′W / 45.66°N 122.68°W / 45.66; -122.68 Rocky Butte Cinder cone 174 571 Pleistocene 45°32′49″N 122°33′54″W / 45.547°N 122.565°W / 45.547; -122.565 Powell Butte Cinder cone 191 627 Pleistocene 45°29′13″N 122°30′14″W / 45.487°N 122.504°W / 45.487; -122.504 Mount Sylvania Cinder cone 292 958 Pleistocene 45°26′17″N 122°43′16″W / 45.438°N 122.721°W / 45.438; -122.721 Mount Hood Stratovolcano 3,426 11,240 1866 (major), 1907 (minor) 2 45°22′26″N 121°41′42″W / 45.374°N 121.695°W / 45.374; -121.695 Olallie Butte Shield volcano 2,199 7,215 Pleistocene 44°49′12″N 121°45′50″W / 44.820°N 121.764°W / 44.820; -121.764 Mount Jefferson Stratovolcano 3,199 10,495 950 AD? 44°40′26″N 121°47′56″W / 44.674°N 121.799°W / 44.674; -121.799 Three Fingered Jack Shield volcano 2,390 7,841 Pleistocene 44°28′41″N 121°50′42″W / 44.478°N 121.845°W / 44.478; -121.845 Hogg Rock Tuya 1,548 5,080 Pleistocene 44°25′19″N 121°52′37″W / 44.422°N 121.877°W / 44.422; -121.877 Blue Lake Crater Maar 1,230+ 4,035 680 AD ± 200 years 44°24′40″N 121°46′26″W / 44.411°N 121.774°W / 44.411; -121.774 Hoodoo Butte Cinder cone 1,738 5,702 Holocene 44°24′07″N 121°53′02″W / 44.402°N 121.884°W / 44.402; -121.884 Sand Mountain Field Cinder cones 1,664 5,459 70 AD ± 150 years 44°23′N 121°56′W / 44.38°N 121.93°W / 44.38; -121.93 Hayrick Butte Tuya 1,683 5,523 Pleistocene 44°23′56″N 121°52′16″W / 44.399°N 121.871°W / 44.399; -121.871 Black Butte Stratovolcano 1,937 6,355 1,430,000 years ago (Pleistocene ) 44°23′56″N 121°38′02″W / 44.399°N 121.634°W / 44.399; -121.634 Mount Washington Shield volcano 2,376 7,795 1,330 BP (flank eruption), 250,000 years ago (main) 44°19′55″N 121°50′17″W / 44.332°N 121.838°W / 44.332; -121.838 Belknap Crater Shield volcanoes 2,095 6,873 480 AD? 2? 44°17′06″N 121°50′35″W / 44.285°N 121.843°W / 44.285; -121.843 Black Crater Shield volcano 2,210 7,251 - 44°15′58″N 121°44′53″W / 44.266°N 121.748°W / 44.266; -121.748 Three Sisters Complex volcano 3,157 10,358 1,600 BP 44°06′N 121°46′W / 44.10°N 121.77°W / 44.10; -121.77 Broken Top Stratovolcano 2,797 9,055 100,000 BP 44°04′59″N 121°41′56″W / 44.083°N 121.699°W / 44.083; -121.699 Pilot Butte Cinder cone , lava dome 1,261 4,138 Pleistocene 44°03′40″N 121°16′59″W / 44.061°N 121.283°W / 44.061; -121.283 Tumalo Mountain Shield volcano 2,370 7,775 Pleistocene 44°00′18″N 121°38′31″W / 44.005°N 121.642°W / 44.005; -121.642 Mount Bachelor Stratovolcano 2,764 9,068 5800 BC 43°58′44″N 121°41′17″W / 43.979°N 121.688°W / 43.979; -121.688 Lava Butte Cinder cone 1,529 5,016 7,000 BP 43°55′05″N 121°21′22″W / 43.918°N 121.356°W / 43.918; -121.356 Newberry Volcano Shield volcano 2,435 7,989 690 AD 4 43°43′19″N 121°13′44″W / 43.722°N 121.229°W / 43.722; -121.229 Maiden Peak Shield volcano 2,383 7,818 - 43°37′34″N 121°55′30″W / 43.626°N 121.925°W / 43.626; -121.925 Davis Lake Volcanic field 2,163 7,096 2,790 BC? 43°34′N 121°49′W / 43.57°N 121.82°W / 43.57; -121.82 Diamond Peak Shield volcano , stratovolcano 2,665 8,744 Less than 100,000 BP (most likely 11,000 years ago) 43°31′12″N 122°08′56″W / 43.520°N 122.149°W / 43.520; -122.149 Devils Garden Volcanic field 1,698+ 5,571 Unknown 43°30′43″N 120°51′40″W / 43.512°N 120.861°W / 43.512; -120.861 Squaw Ridge Volcanic field 1,711 5,613 Unknown 43°28′19″N 120°45′14″W / 43.472°N 120.754°W / 43.472; -120.754 Four Craters Volcanic field 1,501 4,924 Unknown 43°21′40″N 120°40′08″W / 43.361°N 120.669°W / 43.361; -120.669 Cinnamon Butte Cinder cones 1,956 6,417 Unknown 43°14′28″N 122°06′29″W / 43.241°N 122.108°W / 43.241; -122.108 Howlock Mountain Shield volcano 2,545 8,351 Pleistocene 43°11′31″N 122°02′20″W / 43.192°N 122.039°W / 43.192; -122.039 Mount Bailey Shield volcano 2,551 8,368 Less than 100,000 BP 43°09′18″N 122°13′16″W / 43.155°N 122.221°W / 43.155; -122.221 Mount Thielsen Shield volcano 2,799 9,184 Pleistocene 43°09′11″N 122°04′01″W / 43.153°N 122.067°W / 43.153; -122.067 Yamsay Mountain Shield volcano 2,498 8,196 Pleistocene 42°55′52″N 121°21′50″W / 42.931°N 121.364°W / 42.931; -121.364 Mount Mazama Stratovolcano , Shield volcano , Caldera , lava domes 2,487 8,159 2250 BC ± 300 years 42°56′N 122°07′W / 42.93°N 122.12°W / 42.93; -122.12 Mount Scott Stratovolcano 2,722 8,929 Pleistocene (400,000 years ago) 42°55′23″N 122°01′05″W / 42.923°N 122.018°W / 42.923; -122.018 Hillman Peak Stratovolcano 2,484 8,157 Pleistocene 42°34′N 122°06′W / 42.57°N 122.10°W / 42.57; -122.10 Union Peak Shield volcano 2,350 7,709 Pleistocene 42°49′52″N 122°13′26″W / 42.831°N 122.224°W / 42.831; -122.224 Pelican Butte Shield volcano 2,450 8,037 300,000 BP 42°30′47″N 122°08′46″W / 42.513°N 122.146°W / 42.513; -122.146 Mount McLoughlin Stratovolcano with a cinder cone and underlied by a shield volcano 2,894 9,495 20,000 BP 42°26′42″N 122°18′54″W / 42.445°N 122.315°W / 42.445; -122.315 Brown Mountain Shield volcano with a cinder cone 2,238+ 7,344+ 12,000 years ago (main), 2,000 years ago (flank) 42°13′N 122°10′W / 42.21°N 122.16°W / 42.21; -122.16 Aspen Butte Shield volcano 2,502 8,208 Less than 3.5 ma 42°18′54″N 122°05′17″W / 42.315°N 122.088°W / 42.315; -122.088