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1991 Map of Greenough Ridge

Name: 1991 Topographic Map of Greenough Ridge
Creator: U.S. Geological Survey
Published: 1991
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1991

About this map

Jackson State Forest encompasses much of this timber-rich Mendocino County landscape, where the North Fork Big River and the East Branch North Fork Big River converge. The topography is defined by significant ridges and clearings, such as Greenough Ridge and Bowman Ridge, interspersed with family-named clearings like Upper Ranch Opening and Hans Ottoson Opening.

A network of drainage gulches and creeks, including Martin Creek and Valentine Creek, suggests a landscape historically shaped by logging and early ranching. High points like Irene Peak and Williams Peak provide orientation across the heavily wooded terrain. This 1991 revision of earlier 1950s data documents the persistent rural character of the region, emphasizing the remote nature of the Greenough Roughs and the various watercourses that feed into the Big River system.