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1967 Map of Updegraff Ridge, 1994 Print
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1967 Map of Updegraff Ridge

USGS Topo · Published 1994

About this map

The Eel River and its North Fork Eel River confluence define this remote stretch of Northern California along the Trinity and Mendocino County border. The river canyon serves as the primary corridor for the Northwestern Pacific railroad, which snakes along the water's edge past isolated benchmarks and settlements like Ramsey and Spyrock. Much of the southern landscape is occupied by the Round Valley Indian Reservation, characterized by high ridges such as Updegraff Ridge and significant landmarks like Coyote Rock. Historical land use is visible through several ranching operations, including Island Mountain Ranch and Big Bend Ranch, while a network of 4WD tracks provides the only access into the steep, spring-fed drainages like Bell Springs Creek and Willow Creek.

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Map Details

Date Portrayed1967
Date Published1994
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.4 x 26.6 inches

Editions of this 1967 Updegraff Ridge Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain