1954 Map of Three Sisters

About this map

Ausaymas Ridge and Dunne Ridge dominate the landscape of the northern Diablo Range, while the agricultural character of the Hollister Valley spreads across the southwest. In the mid-1950s, the area's development centered on established ranching estates such as Hawkins Ranch, Garcia Rancho, and Sparling Ranch. The map captures the complex system of arroyos and canyons that define the local geography, including the Arroyo de las Viboras and the rugged peaks of the Three Sisters. Local education is anchored by the Fairview Sch, situated near the junction of Las Viboras Road and O'Rosa Morada Road. This survey documents a transitional era for the region, noting numerous water management features like the Hawkins Lake Spillway 651 and various unnamed reservoirs serving the surrounding foothills.