1949 Map of Tierra Redonda Mountain

About this map

San Antonio Reservoir dominates the landscape along the San Antonio River, its purple-tinted shoreline revisions reflecting changes in water levels and land use through the mid-20th century. This area, straddling the Monterey and San Luis Obispo county line, captures a transition from traditional valley agriculture to significant water management infrastructure. The presence of both the San Antonio Dam and a portion of the Nacimiento Res to the south underscores the era's focus on regional flood control and irrigation. Steep canyons like Buttle Canyon and Kemp Canyon feed into the valleys, while the prominent Tierra Redonda Mountain and the landmark Bee Rock define the local topography. For those studying the evolution of Hames Valley or Harris Valley, the map details the early roads and drainage patterns that preceded more intensive modern development.