1915 Map of Concord

About this map

Monte del Diablo and the rolling terrain of Contra Costa County define this 1915 survey, which documents the region's transition from Mexican land grants to developing rail-centered towns. Large rancho tracts such as Boca de la Canada del Pinole and Acalanes remain prominent, while growing hubs like Concord and Walnut Creek are anchored by the Southern Pacific and local rail lines. This map is particularly notable for capturing the intricate water networks of the East Bay hills, including the source of San Pablo Creek and the headwaters of San Leandro Creek.