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2021 Map of Porcupine Butte

Name: 2021 Topographic Map of Porcupine Butte
Creator: U.S. Geological Survey
Published: 2021
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2021

About this map

Porcupine Butte and the surrounding volcanic landscape dominate this 2021 survey, situated at the intersection of the Shasta National Forest and Modoc National Forest. The map documents a complex geological area characterized by volcanic vents and subterranean formations, including the Porcupine Lava Tube and Half Mile Tube. To the south, the settlement of Lakin provides a point of human reference amidst a terrain defined by high-elevation features like Snell Butte and Timber Hill.

Transport through this northern California backcountry is marked by the Lava Spur aka Porcupine Butte, tracing a path near the seasonal Porcupine Lake. The concentration of depressions and peaks such as Double Hole Crater, Deep Crater, and the Saddle Hills illustrates the distinct geothermal character of Siskiyou County, where forestry roads and section lines provide the primary framework for navigation.