
Modoc National Forest dominates this landscape, characterized by the volcanic plateaus of Doublehead and Devils Garden. In the early 1990s, this area retained a remote character, centered on natural landmarks like Plum Ridge and Spaulding Butte. Human infrastructure is sparse, with the presence of a Quarantine Station near Mears indicating specific agricultural or biological monitoring in this high-desert environment.
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1886 · Modoc Lava Bed
USGS Topo · 1:250,000
1892 · Modoc Lava-Bed
USGS Topo · 1:250,000
1952 · Timber Mountain
USGS Topo · 1:62,500
1952 · Hackamore
USGS Topo · 1:62,500
1954 · Alturas
USGS Topo · 1:250,000
1958 · Alturas
USGS Topo · 1:250,000
1962 · Alturas
USGS Topo · 1:250,000
1962 · Crank Mountain
USGS Topo · 1:62,500
1962 · White Horse
USGS Topo · 1:62,500
1965 · Alturas
USGS Topo · 1:250,000