1939 Map of Glendora

About this map

The San Gabriel Mountains dominate the northern half of this 1930s landscape, where the Morris Reservoir and Morris Dam manage the flow of the San Gabriel River through the canyon. Below the mountains, the communities of Glendora and San Dimas sit at the intersection of a developing suburban grid and a vital transportation network. This era shows a unique concentration of educational and military institutions along the foothills, including the Girls Collegiate Sch, Carlin Military Academy, and Sierra Military Academy. The regional infrastructure is defined by the Santa Fe and Pacific Electric lines, which cut across the valley floor near the South Hills, serving the citrus-growing region and local schools like Citrus Union High School and Charter Oak School.