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1997 Map of South Sister

Name: 1997 Topographic Map of South Sister
Creator: U.S. Geological Survey
Published: 2001
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2001

About this map

South Sister dominates the Cascade Range landscape in this late 1990s revision, marking the high-altitude boundary between Lane and Deschutes counties. The glacial activity of the era is preserved in the detailed mapping of the Eugene Glacier, Prouty Glacier, and Lost Creek Glacier, which feed into high-mountain waters like Teardrop Pool and Chambers Lakes.

The central portion of the map showcases the expansive volcanic geography of the Three Sisters Rock Mesa and Le Conte Crater, surrounded by the Three Sisters Wilderness. Recreational and ecological pathways are clearly defined, including a significant stretch of the Pacific Crest National Scenic Trail as it winds past Sisters Mirror Lake and Wickiuo Plain. This survey provides a distinct look at the intersection of the Willamette and Deschutes National Forests before more recent geological and climatic changes impacted these high-elevation environments.