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1966 Map of Cucamonga Peak

Name: 1966 Topographic Map of Cucamonga Peak
Creator: U.S. Geological Survey
Published: 1988
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1988

About this map

The dramatic transition from the high ridges of the Angeles National Forest to the developing citrus and suburban corridors of San Bernardino County defines this landscape. Prominent peaks such as Cucamonga Peak and Bighorn Peak overlook a complex network of drainage systems, including Day Canyon Wash and East Etiwanda Creek, which feed into a developing water management system visible in the Flood Control Basin. In the lowlands, the orderly grid of Alta Loma and Etiwanda shows the region's mid-century expansion, anchored by institutional landmarks like Chaffey Union Jr College and Summit Ave Sch.

Evidence of early mountain activity is preserved through labels like Kelly Camp and the Joe Elliot Tree Memorial, while the rugged north is carved by deep watercourses like South Fork Lytle Creek and Icehouse Canyon. This survey captures the era when the agrarian roots of the valley, still marked by named avenues like Banyan St and Lemon Ave, were rapidly meeting the needs of a growing Southern California population.