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1966 Map of Guasti

Name: 1966 Topographic Map of Guasti
Creator: U.S. Geological Survey
Published: 1982
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1982

About this map

Rancho Cucamonga and its surrounding vineyards undergo a period of rapid industrial and infrastructure transition in this mid-century survey. The landscape is anchored by the Cucamonga Winery, signaling the region's agricultural roots, yet the emergence of the Ontario Motor Speedway and the massive Steel Plant to the east reflects the shifting economic base toward heavy industry and entertainment. Transportation corridors dominate the geography, with the San Bernardino Freeway and Mission Blvd cutting across a grid of citrus groves and expanding residential tracts.

Local civic life is visible through numerous neighborhood landmarks, from the Seventh Day Adventist Ch to various schools like Cucamonga Sch and Mission Bell Sch. The southern portion of the map transitions into the U S Military Reservation and the industrial fringes of Fontana, while the Ontario International Airport serves as a major regional hub. The map's purple tinting meticulously tracks the outward creep of urbanization into former agricultural lands.