Modoc National Forest dominates this volcanic landscape along the Siskiyou and Modoc County border. The terrain is defined by dramatic geologic features, including the obsidian-rich Glass Mountain and its expansive Glass Flow to the north. This high-altitude region is heavily forested and crisscrossed by a network of specialized routes such as the Medicine Lake Hwy and South Connector. The prominence of features like Black Mountain and Border Mountain suggests a landscape shaped by significant relief and primitive access. For researchers, the map details numerous forest spurs and landings, including Black Mtn Spur and Lost Loop, illustrating the timber and recreation infrastructure of the late 2010s. Named areas like White King and Whitehorse point to specific localized landmarks within the timbered tracts, while Mud Flats in the southeast corner provides a break in the otherwise varied topography.
32 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.
1886 · Modoc Lava Bed
USGS Topo · 1:250,000
1892 · Modoc Lava-Bed
USGS Topo · 1:250,000
1932 · Bartle
USGS Topo · 1:96,000
1939 · Bartle
USGS Topo · 1:125,000
1952 · Timber Mountain
USGS Topo · 1:62,500
1952 · Medicine Lake
USGS Topo · 1:62,500
1954 · Alturas
USGS Topo · 1:250,000
1958 · Alturas
USGS Topo · 1:250,000
1961 · Hambone
USGS Topo · 1:62,500
1962 · Alturas
USGS Topo · 1:250,000