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historical topo map of Trinity County, CA in 1981

1981 Map of Black Rock Mtn

USGS Topo · Published 1981

This historical map portrays the area of Black Rock Mtn in 1981, primarily covering Trinity County. Featuring a scale of 1:25000, this map provides a highly detailed snapshot of the terrain, roads, buildings, counties, and historical landmarks in the Black Rock Mtn region at the time. Published in 1981, it is the sole known edition of this map.

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Map Details

Date Portrayed1981
Date Published1981
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:25000
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.

Historical Maps of Trinity County Through Time

104 maps found

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain