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2018 Map of McGuire Ridge

Name: 2018 Topographic Map of McGuire Ridge
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

The San Andreas Fault cuts across the southern portion of this Mendocino and Sonoma county borderlands landscape, a region defined by high ridges and deep drainages. In the late 2010s, this area reflects a pattern of isolated clearings and named flats among the timbered heights, including Peachtree Flat and the Lowrey Openings. The topography is marked by significant landmarks like Little Red Rock Mtn and the steep Horsethief Canyon to the east.

Transport through this difficult terrain is facilitated by several winding routes, including Fish Rock Rd and the Gualala Rd, while the Jackknife Tunnel provides a specific point of interest near McKenzie Grade. The drainage network is complex, with the N Fork Gualala River and South Fork Gualala River carving through the mountains. Named features like Johnny Woodin Ridge and Brandt Ridge suggest the deep-rooted local history of ranching and land use in this part of Northern California.