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2017 Map of North Sister

Name: 2017 Topographic Map of North Sister
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

North Sister and Mid Sister dominate this high-elevation landscape within the Willamette National Forest and Deschutes National Forest. The map documents a complex glacial and volcanic environment, featuring the Collier Glacier, Renfrew Glacier, and Hayden Glacier clinging to the steep slopes of the Three Sisters. Volcanic activity is evident through landmarks like Yapoah Crater, Four in One Cone, and the Ahalapam Cinder Field.

Among these natural features, the Pacific Crest Trail and the Pacific Crest National Scenic Trail provide passage through the high country, crossing Scott Pass and Opie Dilldock Pass. Historical human presence is noted at Craig Grave near Craig Lake and the camp area at Sawyer Bar. The topography reveals the transition from the high peaks of the Cascade Range down to the Lane Plateau, showing a network of alpine water sources such as Eileen Lake and the Chambers Lakes.