1900s (20th Century) Maps of Lewis and Clark County, Montana
Explore 169 historic maps of Lewis and Clark County from the 1900s (20th Century). These maps offer a rare glimpse into what life looked like during the 1900s — 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 Lewis and Clark County's landscape evolved across the 1900s, 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 1900s, 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 Lewis and Clark County's history through authentic maps from the 1900s. This is your window into the past.
Lewis and Clark County, MT maps
(169)- 1902 Map of Ovando, 1960 Print
1902 Ovando1960 Print · USGSMontana's mountain ranchlands come into focus at the turn of the century, centered on the valley around Ovando. Genealogists and historians can trace numerous family homesteads and early outposts, including Danaher's Ranch, Woodworth, and Blanchard's Ranch.2 unique versions available - 1903 Map of Saypo
1903 Saypo1903 Print · USGSTeton and Lewis and Clark counties appear at the dawn of the century as a landscape of remote mountain forest reserves and early prairie homesteads. Researchers can trace the holdings of pioneer families at Clark Bros Ranch and Campbell's Ranch or locate early industry at McGunks Sawmill and the local Coal Mine.7 unique versions available - 1903 Map of Coopers Lake
1903 Coopers Lake1903 Print · USGSLewis and Clark and Powell counties are shown at the turn of the century as the high-mountain ranching and mining frontier expanded. Genealogists and researchers can locate family landmarks like Lunds Ranch, Witmer Bros Ranch, and the Klondike Mine.3 unique versions available - 1903 Map of Helena
1903 Helena1903 Print · USGSMontana's mining heartland comes alive at the dawn of the new century, from the state capital to the copper-rich summits above the Silver Bow. Trace the early rail lines serving Marysville, locate the historic barracks of Ft. Harrison, and follow the mountain trails through Mullan Pass.4 unique versions available - 1905 Map of Ovando
1905 Ovando1905 Print · USGSThe Montana backcountry at the turn of the century is a landscape of isolated homesteads and forest reserves. Researchers can locate early family-owned landmarks like Danaher's Ranch and Jakway's Ranch or trace the early timber works at Logging Camp.2 unique versions available - 1920 Map of Choteau
1920 Choteau1920 Print · USGSNorth-central Montana in the early twentieth century shows a landscape being reshaped by irrigation canals and competing rail lines. Family historians can trace early settlements like Agawam, Bole, and Gilman, or locate regional landmarks like Priest Butte and Pishkun Reservoir. - 1936 Map of Silvertip
1936 Silvertip1936 Print · USGSThe Flathead National Forest wilderness in the mid-1930s was a land of isolated outposts and early aviation. Researchers can trace the early ranger station network at Spotted Bear Ranger Sta and remote landmarks like Indian Camp or Limestone Cabin.3 unique versions available - 1942 Map of Silvertip
1942 Silvertip1942 Print · USGSThe South Fork of the Flathead River backcountry is captured here in the late thirties, showing a wilderness managed by air and trail. Locate historic outposts like Big Prairie Ranger Sta, early airstrips, and remote cabins such as Limestone Cabin.2 unique versions available - 1943 Map of Hogan
1943 Hogan1943 Print · USGSCrossing the Continental Divide during the early twentieth century, this survey shows the high-country landscape between the Sun and Dearborn rivers. Researchers can trace early settlements like Stearns and Hogan, or find remote landmarks such as Silver Camp and the Dry Creek Reservoir Site. - 1947 Map of Butte, 1949 Print
1947 Butte1949 Print · USGSWestern Montana at the peak of its rail-and-river era shows the vital connections between the mining and industrial centers of Butte and Helena. Researchers can trace the three major railroad lines serving mountain settlements like Garrison, Philipsburg, and Warm Springs.2 unique versions available - 1948 Map of White Sulphur Springs, 1951 Print
1948 White Sulphur Springs1951 Print · USGSMontana's capital and the high country of the Big Belt Mountains come alive in this mid-century survey. Trace the early hydroelectric developments at Canyon Ferry Dam or follow the historic rail lines through Ringling and Townsend. - 1950 Map of Jefferson City, 1952 Print
1950 Jefferson City1952 Print · USGSMining districts in Jefferson and Lewis and Clark Counties are shown in high detail during the early fifties. Trace the history of the Northern Pacific rail line and dozens of old workings like the Grey Eagle Mine and Rimini.5 unique versions available - 1950 Map of Canyon Ferry, 1952 Print
1950 Canyon Ferry1952 Print · USGSBroadwater and Lewis and Clark counties are captured here in the mid-century as the Missouri River valley underwent massive change. Genealogists and historians can trace the transition from old settlements like York and Placer to the rising waters of Canyon Ferry Lake.3 unique versions available - 1950 Map of East Helena, 1954 Print
1950 East Helena1954 Print · USGSThe Missouri River valley near East Helena comes to life in the early fifties as a hub of rail transport and industrial mining. Genealogists and local historians can locate rural landmarks like Harmony School, St Anns Cem, and the Economy Mine.4 unique versions available - 1950 Map of Helena, 1954 Print
1950 Helena1954 Print · USGSThe Montana state capital and its mining-era outskirts are captured here just after the war, showing the city's growth alongside established military and medical sites. Researchers can trace the legacy of Unionville, locate the St Joseph Orphan Home, or explore the many gulches and mines that defined the early local economy.6 unique versions available - 1954 Map of Great Falls
1954 Great Falls1954 Print · USGSThe Missouri River valley in the mid-1950s is shown at a time of significant industrial and military growth. Genealogists and historians can locate early schools and rail stops like Tiger Butte Community Center, Fort Benton, and the Anaconda Wire Plant.4 unique versions available - 1954 Map of Basin, 1956 Print
1954 Basin1956 Print · USGSJefferson and Powell Counties were centers of intense mountain industry in the mid-fifties, linked by the GREAT NORTHERN rail line. Researchers can trace dozens of individual lode and placer operations, including the Monarch Mine, Bullion Mine, and the local rail hub at Basin.3 unique versions available - 1955 Map of Choteau, 1978 Print
1955 Choteau1978 Print · USGSWestern Montana during the mid-fifties is captured here as a land of rugged high-country wilderness and vital eastern plains irrigation. Genealogists and historians can locate remote outposts like Condon, the communal Miller Colony, and the rail stops of the Chicago Milwaukee St Paul and Pacific. - 1957 Map of Choteau
1957 Choteau1957 Print · USGSMontana's mountain front meets the eastern plains in the mid-fifties, showing the transition from forested wilderness to irrigated ranch land. Genealogists and historians can trace the rail lines of the Great Northern and find settlements like Choteau, Augusta, and Seeley Lake. - 1957 Map of Great Falls
1957 Great Falls1957 Print · USGSMontana's central plains and mountain foothills are captured here in the mid-fifties, showing the hub of Great Falls and the surrounding grain-shipping towns. Genealogists can trace family roots through the rail sidings of the Great Northern and small rural communities like Sand Coulee or Fort Benton. - 1958 Map of Butte
1958 Butte1958 Print · USGSWestern Montana's mining and rail corridors are captured in the late fifties, from the urban bustle of the Copper King cities to high mountain passes. Researchers can trace the path of the Milwaukee St Paul and Pacific through Deer Lodge and locate remote outposts like Potomac Post Office.5 unique versions available - 1958 Map of Choteau
1958 Choteau1958 Print · USGSMontana's front range meets the high wilderness in the late fifties, where the Great Northern railway connects ranching towns to the eastern plains. Researchers can trace the development of irrigation at Bynum Reservoir or locate remote camps like the Big Prairie District Ranger Station and Helmville.2 unique versions available - 1958 Map of Porphyry Reef, 1959 Print
1958 Porphyry Reef1959 Print · USGSThe Montana high country along the Continental Divide is shown here in the late fifties, where the Flathead Range meets the Sun River headwaters. Trace the remote Pack Trail network connecting the Wrong Creek Guard Station to landmarks like Porphyry Reef and Teton Pass.2 unique versions available - 1958 Map of Barr Creek, 1960 Print
1958 Barr Creek1960 Print · USGSThe Sun River country comes into focus in the late fifties, showing a landscape defined by ranching and water engineering. Researchers can trace early irrigation routes like Geldrich Ditch and find local landmarks such as Morris Ranch and Black Butte.2 unique versions available - 1958 Map of Sawtooth Ridge, 1960 Print
1958 Sawtooth Ridge1960 Print · USGSIn the late 1950s, this Montana wilderness was a landscape of high alpine ridges and early water infrastructure. You can trace early forest management and remote outposts from the Sun Canyon Lodge to the Hannan Gulch Guard Sta and Home Pack Trail.4 unique versions available
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