
High volcanic plateaus and alpine wilderness dominate this landscape in the Central Cascades as it appeared at the close of the twentieth century. The terrain is defined by the legacy of geologic activity, featuring extensive lava flows and high-elevation basins. Knobs Sheep Camp remains a notable landmark in the northern section of the quadrangle, hinting at the area's history of seasonal grazing before the expansion of modern wilderness management. The map reflects a period of transition where early forest use markers like sheep camps persisted alongside modern recreational and conservation designations.
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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
1934 · Mc Kenzie Bridge
USGS Topo · 1:96,000
1940 · Mc Kenzie Bridge
USGS Topo · 1:125,000
1953 · Salem
USGS Topo · 1:250,000
1954 · Salem
USGS Topo · 1:250,000
1955 · Echo Mountain
USGS Topo · 1:62,500
1955 · Mc Kenzie Bridge
USGS Topo · 1:62,500
1955 · Bend
USGS Topo · 1:250,000
1957 · Bend
USGS Topo · 1:250,000