1955 Map of Pacheco Pass

About this map

Pacheco Pass serves as the central focal point of this mid-century survey, marking a vital transit corridor through the Diablo Range along the boundary of Santa Clara and Merced counties. The landscape is defined by the Pacheco Pass Highway, which had recently been expanded to a 4-lane thoroughfare to accommodate growing travel between the Central Valley and the coast. Surrounding the pass, the terrain of San Luis Gonzaga is dotted with numerous seasonal and permanent water sources, including Dinosaur Lake, Wolf Lake, and the evocative Pigs Bath Tub.