Loading map...

2015 Map of Poison Lake

Name: 2015 Topographic Map of Poison Lake
Creator: U.S. Geological Survey
Published: 2015
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2015

About this map

Lassen National Forest terrain dominates this 2015 survey, where the high volcanic landscape of the southern Cascades creates a complex network of seasonal water bodies and peaks. The area is defined by Poison Lake and the nearby Poison Butte, showing a geography shaped by both natural drainage and land management. The presence of Half Cabin Reservoir and Ebey Lake alongside the seasonally dry Dry Lake illustrates the varied hydrology of the region, while landmarks like Cal Mtn and Grass Valley provide clear topographic reference points for this part of Lassen County.

Industrial activity and transit are noted through features like the N Poison Pit and the path of Ca 44, which cuts through the southern portion of the quadrangle. For researchers tracking local history or land use, the map details established flats and springs such as Patterson Flat and Robbers Spring, providing a precise record of the named features and infrastructure within the forest's boundaries at the time of the survey.