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1985 Map of Prospect Peak

Name: 1985 Topographic Map of Prospect Peak
Creator: U.S. Geological Survey
Published: 1985
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1985

About this map

Cinder Cone and the surrounding volcanic terrain dominate this 1980s topographic study of the northeastern corner of Lassen Volcanic National Park. The landscape is defined by the massive Fantastic Lava Beds, a stark basaltic flow that terminates abruptly into the waters of Butte Lake and Snag Lake. Near the cone, the Painted Dunes offer a distinct geological contrast, illustrating the complex eruptive history of the region.

Beyond the primary volcanic features, the map tracks the boundary between the park and Lassen National Forest, following the Shasta and Lassen County line. The eastern portion transitions into the Caribou Wilderness, where numerous small water bodies like Widow Lake and the Lower Twin Lakes are connected by seasonal drainages such as Grassy Creek. This era of mapping shows the established trail networks and backcountry resources before modern high-resolution digital updates.