Diamond Peak (Oregon)
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Diamond Peak is a volcano in Klamath and Lane counties of central Oregon in the United States. It is a shield volcano, though it might also be considered a modest stratocone. Diamond Peak forms part o
Diamond Peak volcano in October 2005, with the smaller Mount Yoran to the right
Diamond Peak as seen from Oregon 58 (June 2023)
Diamond Peak seen from Oregon Route 58, with Mount Yoran at far right, in January 2016
Mount Thielsen
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Mount Thielsen, is an extinct shield volcano in the Oregon High Cascades, near Mount Bailey. Because eruptive activity ceased 250,000 years ago, glaciers have heavily eroded the volcano's structure, c
Diamond Peak (Oregon)
…trailheads at Rockpile and Summit Lake to the southeast of Oakridge and Eugene. The two major routes to the southern summit offer views of Summit Lake and Mount Thielsen. Another route for climbing Diamond Peak begins from Corrigan Lake, which can be reached by forest roads about 30 miles (48 km) past Hills Creek Reservoir…
Mount Thielsen's eroded edifice from the Pacific Crest Trail
Mount Thielsen seen from the south in the 1930s
The Juan de Fuca Plate is being subducted under the North American Plate, generating gradual, diverse volcanism.
Aerial view of Mount Thielsen