1998 Map of Porcupine Butte

About this map

The Burnt Lava Flow Geological Area dominates the northern expanse of this Siskiyou County landscape, revealing a complex volcanic terrain defined by stark geologic transitions. Volcanic activity is etched into the topography through features like Deep Crater, Double Hole Crater, and Porcupine Butte. The map details the intersection of the Shasta Trinity National Forest and Modoc National Forest, where resource management is marked by a Cinder Pit and a network of Forest Service routes including the Mc Cloud Big Valley Rd. In the southern reaches, the small settlement of Lakin sits near the base of these volcanic highlands, while Porcupine Lake provides a rare water feature amidst the cinder hills and lava flows. This survey captures a specialized mountain environment shaped by post-glacial volcanism and mid-century forestry.