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2018 Map of Poison Lake

Name: 2018 Topographic Map of Poison Lake
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

Lassen National Forest terrain in Lassen County defines this area of high-elevation basins and volcanic features. At its center lies the namesake Poison Lake, a prominent body of water surrounded by distinctive landmarks like Poison Butte and the Poison Pit mine. This high-country landscape is shaped by its seasonal water sources and ranching history, evident in sites such as Longs Headquarters and Longs Well to the north.

Transportation through the forest is anchored by Ca 44 and Pittville Rd, which connect various flats and valleys used for timber and grazing. Beyond the larger lakes, the map reveals smaller, geographically specific features like Half Cabin Reservoir, Ebey Lake, and the aptly named Coyote Hole. The terrain alternates between open expanses like Patterson Flat and Grays Valley and prominent rises such as Patterson Mtn and Cal Mtn, illustrating the varied topography of this section of the northern California wilderness.