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2018 Map of Mount Harlan

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

USGS Topo · Published 2018

About this map

The Gabilan Range dominates this portion of the Central Coast, where the boundary between San Benito County and Monterey County winds through a complex system of peaks and drainages. The San Andreas Fault cuts across the northeastern corner, a geological presence that shapes the high-elevation valleys and steep gulches of the region. Significant landmarks including Mt Harlan, Bluerock Mtn, and Mt Olds provide vertical relief above tucked-away basins like Round Spring Valley and Grass Valley.

Hydrological patterns are defined by numerous seasonal and perennial flows, such as Pescadero Cr, Quail Cr, and Swamp Cr, which carve through deep incisions like Beartree Canyon and Long Canyon. While the landscape is primarily defined by its physical geography, human access is marked by several backcountry routes including Grass Valley Rd and Harlan Mountain Rd, reflecting the remote ranching and viticultural character of these uplands.