The Marble Mountains define this high-elevation landscape in Klamath National Forest, where the topography is dominated by steep ridges and a dense network of glacial basins. The terrain is marked by significant peaks such as Boulder Peak and Red Mtn, which overlook a series of alpine water bodies including Isinglass Lake, Lower Wright Lake, and Upper Wright Lake. The hydrography of the region is complex, with numerous creeks like Shackleford Cr and Mill Cr draining the slopes into the surrounding valleys.
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1886 · Shasta
USGS Topo · 1:250,000
1894 · Shasta
USGS Topo · 1:250,000
1914 · Seiad
USGS Topo · 1:125,000
1922 · Seiad
USGS Topo · 1:125,000
1923 · Sawyers Bar
USGS Topo · 1:125,000
1931 · Etna
USGS Topo · 1:96,000
1932 · Yreka
USGS Topo · 1:96,000
1934 · Etna
USGS Topo · 1:125,000
1939 · Yreka
USGS Topo · 1:125,000
1948 · Weed
USGS Topo · 1:250,000