1942 Map of Corona

About this map

The Prado Flood Control Basin serves as a focal point of this Inland Empire landscape, where the confluence of Chino Creek and the Santa Ana River meets the massive engineering of Prado Dam. This 1940s-era geography captures the region during a period of transition, featuring the grid-like agricultural developments near Norco and the established town center of Corona. Significant institutional landmarks include the California Institution for Men and the Rancho Santa Ana Botanic Gardens along the canyon floor. To the south, the terrain rises sharply into the Santa Ana Mountains, revealing a network of remote sites such as Hidden Ranch and peaks like Sierra Peak. Rail history is well-represented by the Pacific Electric Railway and the Atchison Topeka and Santa Fe, which track the routes of early twentieth-century commerce through the Temescal Wash.