Deschutes & Ochoco National Forests
Crooked River National Grassland

Oregon Volcanoes

Mt. Hood Volcano

SUMMARY

Type: stratovolcano
Activity: dormant
Last Eruption: 1865 A.D.
Rock Type: andesite to dacite
Eruptive Volume: 30 to 60 cu km
Latitude: 45.37 N
Longitude: 121.70 W
Location Maps: from TIGER Mapping Service

• State Level - shows state and communities
• County Level - shows county lines, highways, and communities
• Local Level - shows above plus lakes and local roads

Topo Map from TopoZone

Mt. Hood Photo Menu

GEOLOGIC BACKGROUND:

Mt. Hood is located on the crest of the Cascade Range, 75 kilometers east-southeast of Portland, Oregon, and 35 kilometers south of the Columbia River. At 11,245 feet high, Mt. Hood is the fourth highest peak in the Cascades and the highest in Oregon.

Much of the south slope of Mount Hood is a broad, relatively smooth fan that slopes down to the area around Government Camp and is bounded on the east by the White and Salmon River valleys. 

HISTORIC ACTIVITY:

• The most recent pumice and ash eruption occurred in the 1865 and was centered at the Crater Rock dome. 
• There is fumarolic activity near Crater Rock and some hot-spring activity occurs lower on the volcano flanks.

DATA SOURCE:

• USGS
  

ADDITIONAL INFORMATION

• Link to U.S.G.S. - CVO's Mt. Hood Info
• Link to U.S.G.S. Visit a Volcano Info for Mt. Hood
• Link to VolcanoWorld's Mt. Hood Info
• Link to Univ. of Washington's Mt. Hood Seismicity Page
• Link to Univ. of Washington's Latest Quakes at Mt. Hood
• Link to Global Volcanism Networks Mt. Hood Information