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2018 Map of Sentinel Rock

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

USGS Topo · Published 2018

About this map

Sentinel Rock stands as a prominent landmark in this high-desert landscape of Humboldt County, marking the transition between rugged uplands and the expansive Quinn River Valley. The terrain is defined by the sharp rise of the Double H Mountains in the southwest and the Sentinel Hills to the north, creating a natural corridor that has long served as a passage through the region. This is most evident at Thacker Pass, a critical topographical notch that provides a route across the mountain range.

A complex drainage network feeds the valley floor, with seasonal watercourses like Rock Cr, Crowley Cr, Pole Cr, and Cherry Cr descending from the heights toward the Quinn River. The map illustrates a classic Great Basin environment where water availability dictates the movement of both people and wildlife, with the Quinn River itself creating a distinct riparian zone along the eastern edge of the quadrangle.