Mount Jefferson, Stratovolcano in Cascade Range, Oregon, US
Mount Jefferson rises to an elevation of 10,497 feet, making it the second highest mountain peak in Oregon's Cascade Volcanic Arc formation.
The first documented climb to the summit occurred in 1888 by mountaineers R. L. Farmer and E. C. Cross, marking the beginning of recorded ascents.
The mountain received its name from the Lewis and Clark Expedition in 1806 as a tribute to President Thomas Jefferson of the United States.
The Mount Jefferson Wilderness includes over 190 miles of trails and 150 lakes, with access points primarily available through western slope trailheads.
The volcano's structure contains at least 35 small vents within 15 kilometers of the main cone, reflecting its complex geological development.
Location: Linn County
Location: Marion County
Elevation above the sea: 3,199 m
Made from material: andesite
GPS coordinates: 44.67433,-121.79959
Latest update: May 27, 2025 06:59
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Olallie Lake Guard Station
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Pamelia Creek Bridge
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Fish Lake Guard Station
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