1904 Map of Pomona

About this map

The San Gabriel Mountains dominate the northern landscape of this late-nineteenth-century survey, casting a long shadow over the growing citrus and railroad towns of the valley below. This map captures a pivotal moment of expansion as the Atchison Topeka and Santa Fe Railroad and the Southern Pacific Railroad compete for dominance across the San Gabriel Valley. The grid systems of Azusa, Covina, and Glendora are firmly established, yet the transition from agriculture to suburban settlement is evident in the inclusion of places like Lordsburg and the short-lived Alosta. Irrigation infrastructure, critical to the region's development, is documented through features like the Covina Canal and various ditches. Further south, the San Jose Hills separate the valley from the ranch lands of La Puente, while the eastern edge follows the Boundary Line between Los Angeles and San Bernardino counties near Pomona.