2015 Map of McGuire Ridge

About this map

Old Red Rock Place and the surrounding coastal range of Northern California are defined by a complex network of ridges and watercourses along the Mendocino and Sonoma county line. The geological significance of the area is anchored by the trace of the San Andreas Fault in the southwest corner, while the N Fork Gualala River and South Fork Gualala River carve deep drainages through the territory. Named landmarks such as Gualala Mtn, Little Red Rock Mtn, and Johnny Woodin Ridge suggest a landscape shaped by both natural forces and early mountain transit, evidenced by the Jackknife Tunnel and the McKenzie Grade. Distinctive clearing-like features such as Lowrey Openings and Cox Opening punctuate the ridges, marking specific locales within the dense geography of the McGuire Ridge quadrangle.