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1981 Map of Black Rock Mtn
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1981 Map of Black Rock Mtn

USGS Topo · Published 1981

About this map

Six Rivers National Forest and Trinity National Forest converge in this high-altitude landscape of Trinity County, where narrow ridges and deep gulches define the topography. The 1981 survey reveals a territory primarily managed for natural resources, featuring the Bonanza Mine and Lucky Sunday Mine tucked into the steep slopes of Van Horn Ridge. The presence of these operations alongside the Lookout Tower on a prominent peak illustrates the dual history of extraction and forest management in the region.

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Map Details

Date Portrayed1981
Date Published1981
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:25,000
Physical Dimensions39.9 x 23.9 inches

Editions of this 1981 Black Rock Mtn Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain