
Mount Thielsen towers over the high divide of the Cascade Range on this 2017 study, where the boundary between Douglas County and Klamath County follows the crest of the mountains. This high-elevation landscape is defined by the Pacific Crest National Scenic Trail, which winds northward through the Umpqua National Forest and Winema National Forest. The map illustrates a complex drainage system radiating from the central peaks, with headwaters for Thielsen Cr and Howlock Cr cutting deep into the volcanic slopes.
26 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.
1917 · Diamond Lake
USGS Topo · 1:125,000
1935 · Chemult
USGS Topo · 1:96,000
1941 · Chemult
USGS Topo · 1:125,000
1955 · Crescent
USGS Topo · 1:250,000
1956 · Diamond Lake
USGS Topo · 1:62,500
1956 · Summit Lake
USGS Topo · 1:62,500
1957 · Crescent
USGS Topo · 1:250,000
1958 · Crescent
USGS Topo · 1:250,000
1958 · Roseburg
USGS Topo · 1:250,000
1959 · Roseburg
USGS Topo · 1:250,000