Nature
Diller Glacier is a glacier in Oregon’s Cascade Range on the southeast slopes of Middle Sister, an extinct stratovolcano. At an average elevation of about 9,000 feet in the central Oregon Cascades, it stands out for its setting on one of the Three Sisters volcanoes. The site reflects the combined forces that shaped this mountain landscape, preserving ice on the flank of a long-extinct volcanic peak.
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Oregon · United States