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1986 Map of Trigo Mts

Name: 1986 Topographic Map of Trigo Mts
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

The Colorado River serves as the central artery for this arid borderland, defining the boundary between Arizona and California. Along its lush banks, the Cibola National Wildlife Refuge and Imperial National Wildlife Refuge protect a network of riparian habitats, including Adobe Lake, Taylor Lake, and Three Finger Lake. This corridor contrasts sharply with the surrounding desert, where settlements like Palo Verde and Picacho are established near the water's edge.

Industrial and recreational activity is scattered throughout the various mountain ranges. In the east, the Castle Dome Mountains are home to the Castle Dome Mine, while the western Chocolate Mountains contain the Paymaster Mine and Gold Basin Mine. Large swaths of the landscape are dedicated to military and conservation use, notably the Yuma Proving Ground and the Chocolate Mountain Aerial Gunnery Range. Historic river access points, such as Paymaster Landing and Walters Camp, indicate the enduring importance of the river for both mining logistics and modern recreation.