1920 Map of Pacheco Pass

About this map

The Diablo Range dominates the western half of this 1920 survey, dropping sharply into the agricultural expanse of the San Joaquin Valley to the east. This landscape represents a critical transit corridor before the modern era of highway expansion, centered on the ancient crossing at Pacheco Pass. The early industrial footprint of the region is visible through the Bald Eagle Mine tucked into the canyons and the Shell Pumping Sta on the valley floor, indicating the intersection of mineral extraction and burgeoning energy infrastructure.