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1967 Map of Updegraff Ridge, 1969 Print
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1967 Map of Updegraff Ridge

USGS Topo · Published 1969

About this map

The Eel River carves a winding path through this corner of the Emerald Triangle, defining the boundary between Trinity and Mendocino counties. The landscape is dominated by the Northwestern Pacific Railroad, which follows the river's tight bends and steep canyons, connecting remote points like Bell Springs and Spyrock. This era shows the intricate tract divisions of the Round Valley Indian Reservation, with the Treaty Boundary clearly delineated across the rugged terrain.

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Map Details

Date Portrayed1967
Date Published1969
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.9 inches

Editions of this 1967 Updegraff Ridge Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain