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1954 Map of Ontario

Name: 1954 Topographic Map of Ontario
Creator: U.S. Geological Survey
Published: 1960
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1960

About this map

San Antonio Wash carves through the landscape, defining the border between Los Angeles and San Bernardino counties as the Inland Empire expanded mid-century. This survey highlights the dense academic and civic infrastructure of Claremont, featuring Pomona College, Scripps College, and the Men's College alongside the Rancho Santa Ana Botanic Garden. The industrial and transportation backbone of the region is evident in the heavy rail corridors of the Atchison Topeka and Santa Fe and the Southern Pacific, which supported the agricultural and commercial centers of Ontario and Pomona.

To the south, the sprawling grounds of the Chino Prison (Prado Dam) contrast with the developing residential grids and early aviation sites like Cable-Claremont Airport and the Ontario International Airport. Small rail sidings like Narod and Sunsweet hint at the area's agricultural processing history, while numerous local schools and cemeteries like Palomares Cemetery and Oak Park Cemetery provide essential touchpoints for genealogists tracing family roots in this rapidly growing suburban corridor.