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1977 Map of Dinsmore

Name: 1977 Topographic Map of Dinsmore
Creator: U.S. Geological Survey
Published: 1978
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1978

About this map

The Van Duzen River and Mad River cut through the heavily timbered sections of the Six Rivers National Forest along the Humboldt and Trinity county line. This 1970s landscape centers on the small community of Dinsmore, featuring the Dinsmore-Humboldt County Airport and essential mountain infrastructure like the Mad River Ranger Station. The settlement pattern reflects the area's role as a regional hub for education and communication, anchored by the Southern Trinity High School and Van Duzen School, alongside the Low Gap Radio Facility perched near Mad River Ridge.

Remote valleys and peaks dominate the interior, including Buck Mountain and Tierney Peak, where a network of primitive roads and jeep trails connect isolated landmarks like Buck Rock and Browns Rock. The mapping of small-scale industry is evident through the Borrow Pit and Gravel Pit, while the river levels are monitored at the Gaging Station near Low Gap. This survey documents a critical point in northern California’s mountain development, balancing forest management with local civic needs.