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1971 Map of Monumental Pass

Name: 1971 Topographic Map of Monumental Pass
Creator: U.S. Geological Survey
Published: 1973
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1973

About this map

Sacramento Mountains dominate this 1970s topographic record, where the terrain transitions sharply into the Chemehuevi Valley to the south. This arid landscape is defined by its transit corridors rather than permanent settlements, featuring the notable Monumental Pass and Lobecks Pass. The presence of a high-altitude Radio Tower and various Jeep Trails suggests a mid-century infrastructure focused on communication and utility maintenance rather than habitation.

Evidence of resource exploration is visible through a lonely Prospect in the southeastern corner, while multiple Pipeline routes traverse the desert floor, cutting across section lines. The map captures a moment in the early 1970s when the region served primarily as a rugged passage for utilities and intrepid desert travelers, long before modern expansions altered the remote character of San Bernardino's eastern desert reaches.