1940s Maps of Riverside County, California

1. 1940 Map of Dome Rock Mts

   

   1940 Dome Rock Mts

   1940 Print · USGS

   The Arizona and California borderlands along the Colorado River are captured here during the 1930s mining era. Researchers can trace historic prospecting sites like the Darling Mine and Goodman Mine or locate crossings at Diablo Pass.

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4. 1940 Map of Palm Springs, 1955 Print

   

   1940 Palm Springs

   1955 Print · USGS

   Palm Springs and the Coachella Valley are captured here as the mid-century resort era began. Trace the early street grids of Palm Springs, the rail operations at Palm Springs Station, and the boundaries of the Agua Caliente Indian Reservation.

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7. 1940 Map of Frink, 1956 Print

   

   1940 Frink

   1956 Print · USGS

   The Imperial County desert meets the shoreline of the Salton Sea in the early 1940s as infrastructure begins to reshape the basin. You can trace the Southern Pacific rail line through remote stops at Frink, Pope, and Wister, or locate the historic Frink Spring.

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10. 1940 Map of Hemet Reservoir, 1956 Print

    

    1940 Hemet Reservoir

    1956 Print · USGS

    Riverside County's high-country terrain and tribal lands come into focus in this mid-century survey of the San Jacinto area. Genealogists and researchers can trace old ranch trails and remote sites like Anza, Keen Camp, and the Gold Shot Mine.

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13. 1940 Map of Cottonwood Spring, 1956 Print

    

    1940 Cottonwood Spring

    1956 Print · USGS

    Riverside County in the early 1940s reveals a desert landscape in transition as massive water projects like the Colorado River Aqueduct and Coachella Canal take shape. Genealogists and historians can trace rail-side stops like Mortmar and Desert Camp near the Salton Sea shore.

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16. 1940 Map of Iris Pass, 1956 Print

    

    1940 Iris Pass

    1956 Print · USGS

    The Imperial County desert at the onset of World War II shows a landscape shifting from traditional trails to military use and large-scale irrigation. Trace historic desert travel via Ehrenberg Road, Salvation Spring, and the Coachella Canal.

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19. 1940 Map of Canyon Spring, 1957 Print

    

    1940 Canyon Spring

    1957 Print · USGS

    The Colorado Desert of Riverside County is captured in this 1940s survey at a time of early infrastructure and ranching. Genealogists and researchers can trace remote water sources and landmarks like Hayfield Reservoir, Shaver Summit, and the Skylark Ranch.

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22. 1940 Map of Durmid, 1964 Print

    

    1940 Durmid

    1964 Print · USGS

    Imperial County and the desert shoreline of the Salton Sea appear here in the early 1940s, just as new water infrastructure reached the area. Researchers can trace the Southern Pacific rail line through Durmid and Bertram or follow the early Anza Trail past Truckhaven.

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25. 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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28. 1941 Map of Toro Peak, 1954 Print

    

    1941 Toro Peak

    1954 Print · USGS

    The Coachella Valley and Santa Rosa Mountains appear here in the early 1940s, just as modern desert communities were emerging. Trace the early development of Rancho Mirage and La Quinta or locate historical sites like the Garnet Queen Mine and Pinyon Flat.

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31. 1941 Map of Clark Lake, 1956 Print

    

    1941 Clark Lake

    1956 Print · USGS

    Borrego Valley and the Santa Rosa Mountains are captured here in the early 1940s, showing a desert landscape before modern development. You can trace the early ranching history of the region through markers like Rancho De Anza, Brinniger Ranch, and the Anza Trail.

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34. 1941 Map of Coachella, 1956 Print

    

    1941 Coachella

    1956 Print · USGS

    Riverside County at the dawn of the 1940s reveals a desert landscape undergoing a profound transformation through irrigation and rail. Genealogists and historians can trace family-named landmarks and tribal boundaries near Indio, Mecca, and the Coachella Valley High Sch.

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37. 1941 Map of Edom, 1957 Print

    

    1941 Edom

    1957 Print · USGS

    The Coachella Valley and Little San Bernardino Mountains appear here during the early 1940s as desert ranching and date cultivation expanded. Genealogists and historians can locate family-named landmarks like Two Bunch Palms Ranch, Snyder Date Gardens, and the original settlement at Edom.

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40. 1941 Map of Margarita Peak, 1961 Print

    

    1941 Margarita Peak

    1961 Print · USGS

    San Diego's coastal ranch lands and backcountry peaks are captured here in the early forties, just before the landscape shifted toward major military use. Researchers can trace historic family estates like Rancho Santa Margarita and old rail stops along the AT&SF RR near De Luz Station.

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43. 1942 Map of Lake Elsinore

    

    1942 Lake Elsinore

    1942 Print · USGS

    In the early war years, this area of Riverside County remained a mix of mining outposts, large ranchos, and lakefront towns. Genealogists and historians can trace family properties like Lyne Ranch and Baker Ranch or follow the old Santa Fe Railroad past Terra Cotta and Willard.

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46. 1942 Map of Agua Dulce

    

    1942 Agua Dulce

    1942 Print · USGS

    The Colorado Desert at the start of World War II reveals a landscape of high peaks and below-sea-level basins. Trace early desert life through the Oasis Sch, the remote Seventeen-Palms oasis, and the shoreline at Fish Springs.

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49. 1942 Map of Clark Lake

    

    1942 Clark Lake

    1942 Print · USGS

    San Diego and Riverside Counties were still largely defined by remote ranching and desert springs during the early 1940s. Genealogists and historians can trace the foundations of the valley at Brinniger Ranch, the Borrego Sch, and the Old Santa Rosa Indian Ruins.

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52. 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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55. 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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58. 1942 Map of Margarita Peak

    

    1942 Margarita Peak

    1942 Print · USGS

    During the early years of World War II, this region of San Diego County remained a landscape of vast ranchos and scattered citrus groves. Genealogists can trace family holdings like Doville Ranch and community hubs including Deluz PO and the Horno Canyon CCC Camp.

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61. 1942 Map of Riverside and Vicinity

    

    1942 Riverside and Vicinity

    1942 Print · USGS

    Riverside and its surrounding citrus lands are captured here during the early years of the war, showing a dense network of railroads and institutional grounds. Genealogists can trace family sites near the County Farm, Sherman Institute, or the Arlington Sta rail junction.

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64. 1942 Map of Temecula

    

    1942 Temecula

    1942 Print · USGS

    Northern San Diego County and southern Riverside County are mapped here in the early 1940s, showing a rural landscape of canyons and ranch lands. Genealogists can trace family holdings at San Luis Rey Rancho or find early schools like Lilac Valley Sch.

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67. 1942 Map of Blythe

    

    1942 Blythe

    1942 Print · USGS

    The Lower Colorado River valley appears here in the early 1940s, showcasing the agricultural development of the Palo Verde Mesa alongside a booming mining industry. Researchers can locate remote desert outposts and extraction sites like Midland, the U S Gypsum Mine, and Nortons Landing.

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70. 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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73. 1942 Map of MOON MTN, 1943 Print

    

    1942 MOON MTN

    1943 Print · USGS

    The Colorado River valley and its surrounding desert ranges are shown here during the height of the Second World War. Historians can trace the locations of the Parker Alien Reception Center units and former workings at Valenzuella Mines.

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