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1966 Map of Cucamonga Peak

Name: 1966 Topographic Map of Cucamonga Peak
Creator: U.S. Geological Survey
Published: 1980
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1980

About this map

Cucamonga Peak dominates the northern skyline of this San Bernardino landscape, where the steep canyons of the Angeles National Forest meet the expanding citrus groves and suburban tracts of the valley floor. The map documents a significant era of post-war growth, with purple-tinted urban extensions spreading through Alta Loma and Etiwanda up to the base of the mountains. This transition is marked by infrastructure like the Flood Control Basin and the Day Canyon Station, designed to manage the seasonal runoff from Cucamonga Canyon and Deer Canyon.

Education and transit infrastructure define the southern half of the sheet, anchored by the campus of Chaffey Union Jr College and the Southern Pacific rail line. For local historians, the map preserves the location of specialized landmarks such as the Joe Elliot Tree Memorial and remote high-altitude sites like Kelly Camp near Bighorn Peak, providing a clear look at how human activity moved between the wild Cucamonga Wilderness and the industrializing valley.