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1971 Map of Big Maria Mts SW

Name: 1971 Topographic Map of Big Maria Mts SW
Creator: U.S. Geological Survey
Published: 1973
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1973

About this map

The Big Maria Mountains dominate the eastern half of this terrain, where steep slopes meet the desert floor in Riverside County. In the early 1970s, this landscape was defined by industrial exploration and transit. The southwestern foothills and alluvial plains are marked by numerous extraction sites, including a Mine, scattered Prospects, and specific Drill Holes that indicate active mineral survey work.

Logistics and transport are anchored by the Atchison Topeka and Santa Fe railroad corridor cutting through the southwestern corner, paralleled by the desert track of Midland Road. Landmark features like Black Hill provide orientation points in an otherwise arid expanse, while a network of Jeep Trails provides access into the higher elevations. This map captures the intersection of heavy rail infrastructure and the isolated mining operations typical of the California desert during this era.