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2021 Map of Alcalde Hills

Name: 2021 Topographic Map of Alcalde Hills
Creator: U.S. Geological Survey
Published: 2021
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2021

About this map

The Alcalde Hills rise above the western edge of the Central Valley in this topographic study of Fresno County. The landscape is defined by the transition from the steep, canyon-cut ridges of the Diablo Range to the organized agricultural grid of the San Joaquin Valley. Significant water sources like Mustang Spring, Lane Spring, and Indian Springs are scattered throughout the upland terrain, providing vital points of reference in an arid environment.

The settlement of Coalinga anchors the southeastern corner, where the township lines of T20S and T21S meet. While the valley floor is etched with a precise network of roads such as S Derrick Ave and Jayne Ave, the western highlands remain largely undeveloped, punctuated only by naming conventions like Dutch Oven Flat and Oak Flat. The presence of Coalmine Canyon suggests the region's industrial history, while the sprawling drainage systems of Los Gatos Cr and Polvadero Cr illustrate the natural runoff patterns toward the valley floor.