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Bachelor

Photo of this volcano
  • United States
  • Canada and Western USA
  • Stratovolcano
  • 5800 BCE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 43.979°N
  • 121.688°W

  • 2763 m
    9063 ft

  • 322090
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Bachelor.

The Global Volcanism Program has no Weekly Reports available for Bachelor.

The Global Volcanism Program has no Bulletin Reports available for Bachelor.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History

There is data available for 1 Holocene eruptive periods.

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
5800 BCE ± 750 years Unknown Confirmed   Magnetism North flank (Egan cone)
Deformation History

There is no Deformation History data available for Bachelor.

Emission History

There is no Emissions History data available for Bachelor.

Photo Gallery

Mount Bachelor, a symmetrical stratovolcano SW of Bend, Oregon, is seen here from the north with a neoglacial moraine in the center. No known summit eruptions have occurred during the Holocene, although Bachelor was active until the latest Pleistocene and a north flank vent produced a series of lava flows that immediately preceded the eruption of the Mazama ash about 6850 years ago.

Photo by Willie Scott, 1981 (U.S. Geological Survey).
See title for photo information.
Kwohl Butte cinder cone in the foreground is part of a 25-km-long chain of small shield volcanoes and cinder cones extending north to Mount Bachelor. South and Middle Sister volcanoes are visible to the left behind the furrowed slopes of Mount Bachelor.

Photo by Lee Siebert, 1981 (Smithsonian Institution).
See title for photo information.
Kwohl Butte cinder cone is one in a 25-km-long chain of cinder cones and small shield volcanoes south of Mount Bachelor in the central Cascade Range of Oregon. Despite the youthful appearance of the cone, geologic mapping indicates construction of the chain was completed about 12,000 years ago

Photo by Lee Siebert, 1981 (Smithsonian Institution).
See title for photo information.
Mount Bachelor, seen here from the jagged summit of Broken Top volcano to the north, is a symmetrical stratovolcano constructed during the latest Pleistocene. The only known Holocene eruptions were from a cone on the north flank. Mount Bachelor is a major downhill skiing destination of the central Oregon Cascades.

Photo by Lee Siebert, 1982 (Smithsonian Institution).
See title for photo information.
Mount Bachelor, rising 1000 m above Sparks Lake on the west, is a late Pleistocene-to-Holocene basaltic-andesite stratovolcano at the northern end of a 25-km-long chain of scoria cones and small shield volcanoes. The 2763-m-high symmetrical volcano is the site of a major ski resort SW of Bend, Oregon.

Photo by Lee Siebert, 1982 (Smithsonian Institution).
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.

Title: Canada, United States
Publisher: DMA Aerospace Center
Country: United States
Year: 1988
Series: ONC
Map Type: Topographic
Scale: 1:1,000,000
Map of Canada, United States
Title: W US /Map of Dist, Comp, Age-Late CZ Volc Centers
Publisher: US Geological Survey
Country: United States
Year: 1984
Series: MI
Map Type: Geology (Volcano)
Scale: 1:2,500,000
Map of W US /Map of Dist, Comp, Age-Late CZ Volc Centers
Title: Dist, Thickness, Mass of Tephra from Volcanoes
Publisher: US Geological Survey
Country: United States
Year: 1983
Series: MFS
Map Type: Geology (Volcanic Hazard)
Scale: 1:2,500,000
Map of Dist, Thickness, Mass of Tephra from Volcanoes
Title: Distribution, Comp, & Age of L Cen Volcan, Cascade Range, NW US
Publisher: US Geological Survey
Country: United States
Year: 1983
Series: MI
Map Type: Geology
Scale: 1:500,000
Map of Distribution, Comp, & Age of L Cen Volcan, Cascade Range, NW US
Title: Map SHowing Distribution, Composition, and Age of Late Cenozoic Volcanic Centers in Oregon and Washington
Publisher: US Geological Survey
Country: United States
Year: 1982
Series: Misc Investigations
Map Type: Geology
Scale: 1:1,000,000
Map of Map SHowing Distribution, Composition, and Age of Late Cenozoic Volcanic Centers in Oregon and Washington
Title: Geothermal Energy Resources of the Western United States
Publisher: ERDA and USGS
Country: United States
Year: 1977
Map Type: Cultural (Geothermal Resources)
Scale: 1:1,250,000
Map of Geothermal Energy Resources of the Western United States
Title: Bend
Publisher: US Geological Survey
Country: United States
Year: 1971
Series: V502
Map Type: Topographic
Scale: 1:250,000
Map of Bend
Title: Crescent
Publisher: US Geological Survey
Country: United States
Year: 1970
Series: V502
Map Type: Topographic
Scale: 1:250,000
Map of Crescent
Title: Geol Map of OR W of 121st Meridian
Publisher: US Geological Survey
Country: United States
Year: 1961
Series: MI
Map Type: Geology
Scale: 1:500,000
Map of Geol Map of OR W of 121st Meridian
Smithsonian Sample Collections Database

The following 3 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.

Catalog Number Sample Description Lava Source Collection Date
NMNH 112584-1 Basalt -- --
NMNH 112584-2 Basalt -- --
NMNH 112584-3 Pumice -- --
Affiliated Sites