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2015 Map of Mount Harlan

Name: 2015 Topographic Map of Mount Harlan
Creator: U.S. Geological Survey
Published: 2015
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2015

About this map

The San Andreas Fault cuts through the northeastern corner of this terrain, marking a stark geological boundary within the rugged Gabilan Range. Rising above the surrounding canyons and valleys, Mt Harlan and Mt Olds anchor a landscape defined by significant elevation changes and seasonal watercourses. The interior is characterized by a series of high valleys, including Round Spring Valley and Grass Valley, which likely served as crucial landmarks or catchment areas for early travelers and settlers in this remote part of the central coast ranges.

Surface water is represented by numerous intermittent streams such as Pescadero Cr, Gabilan Cr, and Quail Cr, which carve deep incisions into the earth, forming features like Espinosa Canyon and Long Gulch. Movement through the area is largely dictated by these natural contours, with Cienega RD and Encinal RD providing limited access across the San Benito and Monterey County line. This 2015 survey details the intersection of tectonic activity and complex topography in a largely undeveloped stretch of California.