1940s Maps of San Bernardino County, California

1. 1940 Map of Evey Canyon

   

   1940 Evey Canyon

   1940 Print · USGS

   The foothills of the San Gabriel Mts meet the growing community of Claremont in this 1940s-era survey. Genealogists and local historians can trace the early road network of the valley and find mountain landmarks like the Norton Sch and Lower San Antonio Guard Station.

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4. 1940 Map of La Verne

   

   1940 La Verne

   1940 Print · USGS

   La Verne and Claremont are captured here just before the mid-century population boom, showing a landscape defined by foothill canyons and early college campuses. Genealogists and historians can trace local landmarks like Scripps College, the Metropolitan Aqueduct, and Wolfskill Camp.

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7. 1940 Map of Camp Baldy

   

   1940 Camp Baldy

   1940 Print · USGS

   Mount Baldy’s early high-altitude culture and canyon mining are frozen in time just before the mid-century. Researchers can trace the paths to the Gold Dollar Mine, locate the Camp Baldy Guard Station, and see the early route of Baldy Road.

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10. 1941 Map of Swarthout

    

    1941 Swarthout

    1941 Print · USGS

    The high San Gabriel Mountains come into focus during the mid-1930s as a hub for scientific observation and mountain recreation. Researchers can trace the San Andreas Rift Zone or locate early forest outposts like Smithsonian Observatory and Prairie Fork Guard Sta.

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13. 1941 Map of Devore

    

    1941 Devore

    1941 Print · USGS

    The Cajon Pass area in the early 1940s reveals a landscape defined by critical rail lines and alluvial washes. Researchers can trace the development of infrastructure around Devore through landmarks like the Cajon Sch, Fontana Airport, and the Glenn Helen Infirmary.

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16. 1941 Map of Arrowhead

    

    1941 Arrowhead

    1941 Print · USGS

    San Bernardino expanded toward the mountain front during the late thirties and early forties. Trace the complex rail networks of the Union Pacific and Pacific Electric through old neighborhoods like Ono, Muscoy, and Del Rosa.

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19. 1941 Map of Prado

    

    1941 Prado

    1941 Print · USGS

    Southern California's inland corridor is captured here in the 1930s, showing the river valley before the dam changed the landscape forever. Trace the old routes of the Union Pacific through Prado and locate local landmarks like the Pellissier Ranch.

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22. 1942 Map of Camp Mohave

    

    1942 Camp Mohave

    1942 Print · USGS

    The tri-state borderlands of Nevada, Arizona, and California are captured here in the early 1940s, highlighting a landscape of deep canyons and high-desert mining camps. Researchers can trace historic rail lines and find remote outposts like Searchlight, Nelson, and the riverfront Fort Mohave Indian Reservation.

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25. 1942 Map of San Antonio

    

    1942 San Antonio

    1942 Print · USGS

    The high San Gabriel Mountains meet the Mojave Desert in the early 1940s, showing a rugged landscape of ranching and early mountain recreation. Genealogists and local historians can trace family lands like Smith Ranch and Nuss Ranch, or locate landmarks like the Smithsonian Observatory and Wrightwood.

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28. 1942 Map of Anaheim

    

    1942 Anaheim

    1942 Print · USGS

    Orange County's agricultural heart is captured mid-century during a period of rapid wartime development. Genealogists can locate family landmarks like Diamond Bar Ranch, local schools such as Alamitos Sch, and communities like Garden Grove or Stanton.

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31. 1942 Map of Ivanpah

    

    1942 Ivanpah

    1942 Print · USGS

    The Mojave Desert frontier comes into focus during the early war years, showing a landscape shaped by mining and rail. You can trace the path of the Union Pacific through remote stops like Nipton, Goodsprings, and the junction at Barnwell.

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34. 1942 Map of Hesperia

    

    1942 Hesperia

    1942 Print · USGS

    San Bernardino County ranchlands and mountain passes are captured here during the early years of the war. Genealogists and historians can trace the Atchison Topeka and Santa Fe rail line as it climbs toward Cajon Pass and the Cajon Summit Lookout.

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37. 1942 Map of Corona and Vicinity

    

    1942 Corona and Vicinity

    1942 Print · USGS

    The Riverside County citrus belt thrives in the early 1940s, showing a landscape defined by orchards and early suburban expansion. Researchers can trace the development of Norco around the Norconian Club or locate regional landmarks like La Sierra College.

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40. 1942 Map of San Bernardino

    

    1942 San Bernardino

    1942 Print · USGS

    The San Bernardino Valley flourished as a railroad and citrus hub during the early years of the war. Researchers can trace the extensive tracks of the Atchison Topeka and Santa Fe, the National Orange Show grounds, and local landmarks like the Loma Linda Sanatorium.

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43. 1942 Map of Kramer

    

    1942 Kramer

    1942 Print · USGS

    The high desert comes into focus in the 1930s and 40s as rail transit and early aviation began to shape this corner of San Bernardino. You can trace the Atchison Topeka and Santa Fe tracks through Amargo or find the remote Blake Ranch and Kramer.

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46. 1942 Map of Shadow Mountains

    

    1942 Shadow Mountains

    1942 Print · USGS

    The High Desert at the start of the war reveals a landscape of isolated homesteads and early aviation landmarks. Genealogists and desert historians can locate family outposts like Walton Place and Hess Ranch or trace the early Palmdale Victorville Road.

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49. 1942 Map of Ontario and Vicinity

    

    1942 Ontario and Vicinity

    1942 Print · USGS

    The Inland Empire is shown at a pivotal moment in the early 1940s, when orange groves and vineyards still dominated the landscape between the mountains and the valley floor. Researchers can trace the rail corridors of the SOUTHERN PACIFIC and the Pacific Electric while locating old neighborhood markers like Narod, Sunsweet, and the Sierra Vista Sch.

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52. 1942 Map of Amboy

    

    1942 Amboy

    1942 Print · USGS

    San Bernardino's high desert reveals its rail-and-road bones in the 1940s as transcontinental traffic pulses along the iconic route 66. Researchers can trace the water sources and small stations that made desert life possible, from Bonanza King Well and Wilhelm Camp to the rail stops at Amboy and Cadiz.

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55. 1942 Map of Corona, 1947 Print

    

    1942 Corona

    1947 Print · USGS

    Riverside County at the dawn of the 1940s reveals a unique mix of agricultural roots, mountain canyons, and significant regional infrastructure projects. Genealogists and local historians can trace the early street plans of Corona and Norco, or locate landmarks like the East Vale Sch and the Santiago Reservoir.

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58. 1943 Map of Center Hills

    

    1943 Center Hills

    1943 Print · USGS

    San Bernardino County served as a critical training ground for the California-Arizona Maneuver Area during the war. Military researchers can trace the tactical terrain of the Center Hills and the neighboring Turtle Mts on this provisional army sheet.

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61. 1943 Map of Amboy

    

    1943 Amboy

    1943 Print · USGS

    The Mojave Desert during the Second World War reveals a landscape of critical military training and vital rail infrastructure. Genealogists and historians can trace desert outposts like Bolo Station, the industrial Lime Mine Refinery, and the wartime 3rd Armd Div Camp.

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64. 1943 Map of Fontana

    

    1943 Fontana

    1943 Print · USGS

    The Inland Empire is shown here in the early 1940s, revealing a landscape defined by industrial expansion and extensive rail corridors. Trace the growth of Fontana and Rialto through early landmarks like the South Fontana Sta, Glen Avon Ch, and the numerous Quarries of the Jurupa Mountains.

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67. 1943 Map of Corona

    

    1943 Corona

    1943 Print · USGS

    The Santa Ana River valley during the mid-forties shows a landscape shaped by water management and early inland growth. Trace the development of Corona and Norco alongside the massive Prado Dam and local landmarks like the East Vale Sch.

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70. 1943 Map of Giers Basin

    

    1943 Giers Basin

    1943 Print · USGS

    The Colorado River borderlands come into focus during the early years of the war, when this area served as a military maneuver zone. Researchers can locate desert water sources like Mohave Spring and Screwbean Spring or trace the early footprint of Parker Dam.

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73. 1943 Map of Essex

    

    1943 Essex

    1943 Print · USGS

    The California desert terrain is documented during World War II for military maneuver training. Genealogists and desert historians can locate the Gold Fleece Mine and critical water sources like Honeymoon Spring and the Reservoir at Essex.

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