1954 Map of Mt. Baldy

About this map

San Antonio Heights and the northern edge of Upland sit at the base of the San Gabriel Mountains, where the agricultural grid meets the steep drainage of the San Antonio Canyon. The mid-1950s landscape is defined by water management and fire prevention, featuring the San Antonio Dam and its extensive spillway alongside several guard and ranger stations. Higher elevations include the mountain community of Mt Baldy and the Padua Hills Theater, set against the protected lands of the San Dimas Experimental Forest and multiple national forests. Notable cultural landmarks like the Scudder Oaks School and Thompson Ranch are visible, while the At & SF railroad line cuts through the southern valley, illustrating the connection between the high peaks and the growing citrus and suburban corridor of Southern California.