1942 Map of Chileno Canyon

About this map

The West Fork San Gabriel River cuts a deep course through the heart of the San Gabriel Mountains in this 1940s landscape, which was revised just after the war by the Los Angeles County Engineer. The geography is dominated by water management and mountain access, featuring Dam No 2 and the West Reservoir as critical pieces of regional flood control. Human presence is marked by isolated structures such as the Pasadena Bait Club and remote outposts like Stone Cabin and Tool Cabin. Higher elevations are defined by the winding Angeles Crest Highway and several designated firebreaks. From the heights of Monrovia Peak to the canyon floor at Spring Camp, the map documents the infrastructure required to manage these steep watersheds before mid-century development further altered the drainage patterns of the Angeles National Forest.