1940s Maps of Boulder County, Colorado
Explore 9 historic maps of Boulder County from the 1940s. These maps offer a rare glimpse into what life looked like during the 1940s — showing old roads, neighborhoods, homes, and landmarks that have changed or disappeared over time.
Whether you're researching your family's past, planning a metal detecting trip, or studying how Boulder County's landscape evolved across the 1940s, these high-resolution maps are a powerful tool for exploring the history of this region.
- Focus on a specific era: All maps on this page are from the 1940s, giving you a focused view of this time period.
- See what’s changed: Compare century-old streets, trails, and buildings to today's modern landscape using overlays and satellite layers.
- Research with precision: Use these maps for genealogy, historical research, land use analysis, or educational projects.
- View, download, or print: Maps are fully viewable online in high resolution, and can be downloaded or printed for your own records.
Start exploring Boulder County's history through authentic maps from the 1940s. This is your window into the past.
Boulder County, CO maps
(9)- 1940 Map of Lafayette
1940 Lafayette1940 Print · USGSLafayette and the northern Colorado coalfields are captured in the late 1930s as mining and rail transport shaped the local economy. Genealogists can trace family roots through named landmarks like Mandalay Sch, Lakeview Cem, and the Centennial Mine. - 1942 Map of Eldorado Springs
1942 Eldorado Springs1942 Print · USGSJust before the mid-century, the mountain interface west of Boulder was a landscape of remote ranches and rugged rail lines. Trace the early settlement of Eldorado Springs and find vanished landmarks like the Pine Grove Sch and the Coal Creek Store.4 unique versions available - 1942 Map of Louisville
1942 Louisville1942 Print · USGSLouisville and the high plains of Boulder County are captured here just before the mid-century expansion. Genealogists and historians can trace the early footprints of Superior, Marshall, and Louisville, or locate rural landmarks like the Sacred Heart Ch and Shamrock Sch.3 unique versions available - 1942 Map of Nederland, 1954 Print
1942 Nederland1954 Print · USGSThe Colorado Front Range comes alive in the early 1940s, showing the intersection of high-mountain mining and railroad engineering. Genealogists and historians can trace the foundations of Nederland, the old mining works at Caribou, and the tracks of the Denver and Salt Lake near Tolland.6 unique versions available - 1942 Map of Tungsten, 1955 Print
1942 Tungsten1955 Print · USGSBoulder and Gilpin counties come alive in the 1940s as mining and mountain ranching define the high-country landscape. Genealogists and historians can trace the Denver and Salt Lake rail line through Pinecliffe P O and find remote sites like the Kekionga Mine.5 unique versions available - 1944 Map of Lafayette
1944 Lafayette1944 Print · USGSThe northern Front Range in the years following the Great Depression was a landscape of coal mines and intricate irrigation reservoirs. You can trace the early footprints of Lafayette and Broomfield while locating industrial landmarks like the Centennial Mine and Burn Lee Sch. - 1944 Map of Nederland
1944 Nederland1944 Print · USGSNederland and the mining districts of Boulder and Gilpin Counties are shown here during the early 1940s. Genealogists and historians can trace the legacy of high-country industry through the Denver and Salt Lake rail line and sites like the Zarlengo Saw Mill or Caribou.2 unique versions available - 1944 Map of Eldorado Springs
1944 Eldorado Springs1944 Print · USGSThe Front Range foothills in the 1940s reveal a landscape of mountain ranches and deep canyons just south of Boulder. Genealogists and hikers can trace old homesteads like Walker Ranch, the winding Denver and Salt Lake RR, and early landmarks such as the Copeland Mine.2 unique versions available - 1944 Map of Tungsten
1944 Tungsten1944 Print · USGSBoulder and Gilpin counties are captured here in the mid-1940s, as mountain railroads and mining operations shaped the Front Range. Genealogists can trace family footprints at Lincoln Hills, Pine Glade Sch, and the Kekionga Mine.
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