1962 Map of San Andreas

Transportation and public infrastructure are anchored by the Southern Pacific railroad line and the Calaveras County Airport. Genealogists may find value in the location of the Pioneer Cem and the Mark Twain Hospital, while topographic features like Hogback Mountain and the Bear Mountains illustrate the dramatic elevation changes that shaped the development of early settlements. The presence of Tailings, Quarries, and a Gravel Pit further underscores the extractive industry that remained a primary economic driver for the county well into the mid-20th century.