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1987 Map of Iris Pass
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1987 Map of Iris Pass

USGS Topo · Published 1987

About this map

The Chocolate Mountains dominate this 1980s landscape, an area characterized by its integration into the Chocolate Mountain Aerial Gunnery Range. This mid-century military training ground spans the border between Riverside and Imperial Counties, where restricted access and military utility define the land use. Drainage through the arid terrain is marked by seasonal watercourses like Iris Wash, which cuts through the high-elevation basins. The map provides a look at the transition from rugged mountain peaks to the broad washes used for aerial maneuvers, recording the specialized infrastructure of a Cold War-era desert range before modern technological shifts in military surveying.

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Map Details

Date Portrayed1987
Date Published1987
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.8 inches

Editions of this 1987 Iris Pass Map

Historical Maps of Imperial County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain