
Little Glass Mountain dominates this volcanic landscape, where geological history is written in obsidian and ash within the meeting point of the Klamath, Modoc, and Shasta Trinity National Forests. The map documents a territory defined by geothermal activity and timber management, featuring the expansive Crater Glass Flow and the jagged Tilted Rock Lava Flow. Cultural and industrial markers are sparse but significant, including the Little Hoffman Lookout perched for fire surveillance and various Pumice Mines that utilized the area's volcanic deposits. This 1990s revision captures the area's essential infrastructure, from the Bray Well to the specialized Gooseneck Mc Cloud Ranger District roads, providing a clear record of the high-country terrain before modern shifts in forest management.
36 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
1950 · Bray
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
1961 · Bartle
USGS Topo · 1:62,500