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1914 Map of Petaluma

Name: 1914 Topographic Map of Petaluma
Creator: U.S. Geological Survey
Published: 1924
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1924

About this map

Petaluma and the marshy expanses of Petaluma Creek anchor this early 20th-century landscape, where the Northwestern Pacific railroad and the Petaluma and Santa Rosa RR (Electric) shaped the region's transport. The map reveals a transition from the structured street grid of Petaluma to the expansive ranchos and land grants that defined the border of Sonoma and Marin counties, including Olompali and San Geronimo.

Rural life is documented through a dense network of one-room schoolhouses like Iowa School, Union School, and Black Point School. To the south and west, the terrain rises into Big Rock Ridge and Barnabe Mtn, overlooking valleys populated by working landscapes such as Sleepy Hollow Ranch and the County Farm. Historic transport hubs like Haystack Landing and Tocaloma provide specific reference points for genealogists tracing family roots in these coastal valleys and hills.