
North Sister and Mid Sister dominate this high-elevation segment of the Cascade Range, where the county line separates the Willamette National Forest in Lane County from the Deschutes National Forest. The landscape is a complex of glacial and volcanic activity, featuring the massive Ahalapam Cinder Field, the sharp relief of Obsidian Cliffs, and numerous active ice bodies such as the Collier Glacier and Renfrew Glacier.
66 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1929 · Three Sisters
USGS Topo · 1:125,000
1932 · Three Sisters
USGS Topo · 1:125,000
1955 · Bend
USGS Topo · 1:250,000
1957 · Bend
USGS Topo · 1:250,000
1958 · Bend
USGS Topo · 1:250,000
1959 · Broken Top
USGS Topo · 1:62,500
1959 · Three Sisters
USGS Topo · 1:62,500
1959 · Three Fingered Jack
USGS Topo · 1:62,500
1959 · Sisters
USGS Topo · 1:62,500
1980 · Bend
USGS Topo · 1:100,000