1926 Map of El Monte

About this map

El Monte and its surrounding ranchos define this mid-1920s landscape, where the confluence of the Rio Hondo and the San Gabriel River shaped early development patterns. The map details the transition from large agricultural tracts like Potrero Grande and Potrero de Felipe Lugo to established townites. Industrial and transportation hubs are prominent, specifically the O'donnel Oil Refinery near Pico and the dense network of the Pacific Electric and Southern Pacific Railroad. This survey captures the region just as the expansion of Rosemead and Wilmar began to fill the spaces between historic Spanish land grants. Local education is well-mapped, showing the location of the Roosevelt School, Rosemead School, and the Mill District School, providing a clear look at the social infrastructure of the San Gabriel Valley during this era of growth.