1900s (20th Century) Maps of Trinity County, California
Explore 221 historic maps of Trinity 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 Trinity 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 Trinity County's history through authentic maps from the 1900s. This is your window into the past.
Trinity County, CA maps
(221)- 1909 Map of Big Bar
1909 Big Bar1909 Print · USGSTrinity County at the turn of the century shows a land defined by deep river canyons and remote mountain settlements. Genealogists and local historians can trace early footprints at Hyampom and Hayfork, or locate the high ridges of Barker Mtn and Thompson Peak.2 unique versions available - 1913 Map of Weaverville
1913 Weaverville1913 Print · USGSTrinity and Shasta counties appear here during a peak era of mountain mining and ranching before the mid-century reservoirs were built. Genealogists can trace early homesteads and industrial sites like Whiskytown, Minersville, and the Gladstone Mine.6 unique versions available - 1914 Map of Pilot Creek
1914 Pilot Creek1914 Print · USGSHumboldt and Trinity counties are shown during the early years of the national forest system, before modern road networks penetrated these deep woods. Researchers can trace early infrastructure like Wises Substation and Oak Park R.S. or locate remote landmarks like Durphys Lake. - 1915 Map of Big Bar and Vicinity
1915 Big Bar and Vicinity1915 Print · USGSThe Trinity River wilderness in the early twentieth century was a landscape of isolated mining outposts and river settlements. Genealogists and historians can trace the early footprints of Junction City, Helena, and Hyampom alongside remote landmarks like Keystone Cabin.5 unique versions available - 1918 Map of Anada, 1931 Print
1918 Anada1931 Print · USGSTrinity County in the early twentieth century was a rugged frontier of forest management and river headwaters. Map collectors and genealogists can trace early landmarks like Ruth, the Mad River R.S., and the high elevations of South Fork Mountain. - 1920 Map of Cummings
1920 Cummings1920 Print · USGSMendocino County ranching and transit corridors are captured in the years following the Great War as the modern highway began to take shape. Genealogists and historians can locate family holdings like Buckhorn Ranch and Spittler Ranch alongside early settlements at Bell Springs and Cummings. - 1920 Map of Covelo
1920 Covelo1920 Print · USGSTracing the Eel River in the early twentieth century, this military survey reveals the remote homesteads and rail infrastructure of Mendocino County. Genealogists can locate family-named sites like Fred Simmerly Sr and Nash along the Northwestern Pacific Railroad. - 1920 Map of Harris
1920 Harris1920 Print · USGSHumboldt County ranching and rail life are recorded here during the early twentieth century as the railroad carved its path through the Eel River canyon. Researchers can trace historic family holdings like Carey Ranch or locate early industrial sites such as the Steelhead US Fish Hatchery and Fort Seward. - 1921 Map of Hoaglin, 1922 Print
1921 Hoaglin1922 Print · USGSTrinity County in the early twenties shows a wilderness being mapped for forest management and rail access. Genealogists and researchers can trace early ranger outposts like Soldier Basin R.s. and follow the Northwestern Pacific RR near Island Mountain. - 1922 Map of Island Mountain
1922 Island Mountain1922 Print · USGSNorthern California forest lands and river canyons are detailed in this early twenties tactical survey. Genealogists and researchers can locate remote outposts like Zenia and Hoaglin, or trace the rugged banks of the Mad River and Eel River. - 1922 Map of China Flat
1922 China Flat1922 Print · USGSNorthwestern California at the dawn of the 1920s reveals a landscape of isolated river settlements and early forest service outposts. Genealogists and historians can trace the residents of Quinby and Uptons or locate the China Flat Post Office and Handy Horse Ranger Station. - 1923 Map of Sawyers Bar
1923 Sawyers Bar1923 Print · USGSThe Salmon River canyon in the early 1900s reveals a high-country mining landscape during the height of its activity. Genealogists and historians can trace families at Edie Ranch, locate remote classrooms like Russianville School, and find numerous prospects including the Black Bear Mine.4 unique versions available - 1926 Map of Covelo
1926 Covelo1926 Print · USGSThe isolated high valley of Covelo is captured here in the mid-1920s, surrounded by the wilderness of the California National Forest. Local historians can locate the Indian School, early ranger outposts, and family landmarks like Browns Ranch.2 unique versions available - 1931 Map of Hoaglin
1931 Hoaglin1931 Print · USGSThe Trinity and Van Duzen river systems define this high country during the early 1930s, when remote ranches and forest stations provided the primary human footprint. Researchers can trace family-named sites like Haine Ranch and Blossom Cabin, or locate the isolated Lake Mtn Sch. - 1931 Map of Etna
1931 Etna1931 Print · USGSThe mining camps and river valleys of the Siskiyou-Trinity border are caught in detail during the early 1930s. Researchers can trace historic claims and remote family holdings like the Bonanza King Mine, Etna Ranch, and the East Fork District Sch. - 1934 Map of Etna
1934 Etna1934 Print · USGSThe Scott Valley and high California peaks are seen here in the 1930s as centers of mining and remote mountain ranching. Researchers can trace historic family-named locations such as Parker Ranch, Stoddard Cabin, and the Zarina Mine.4 unique versions available - 1935 Map of Hoaglin
1935 Hoaglin1935 Print · USGSTrinity and Mendocino counties are captured here in the mid-1930s, documenting a landscape of isolated valleys and mountain ranches. Researchers can trace family homesteads like Russ Place and Shannon Place or locate early schools including Cover Sch and Lake Mtn Sch.3 unique versions available - 1935 Map of Dunsmuir
1935 Dunsmuir1935 Print · USGSUpper Siskiyou and Shasta counties are shown here in the mid-1930s as the rail and timber industries shaped the mountain landscape. Genealogists and historians can trace the Southern Pacific line through Dunsmuir, locate the Cedar Park Sch, or find vanished stops like Sims Sta.4 unique versions available - 1944 Map of French Gulch, 1957 Print
1944 French Gulch1957 Print · USGSThe mining districts of Shasta and Trinity counties are captured here in the mid-1940s, showcasing a landscape defined by gold extraction and rugged mountain summits. Researchers can trace historic claims and camps like French Gulch, the Brown Bear Mine, and the original site of Whiskeytown.2 unique versions available - 1948 Map of French Gulch
1948 French Gulch1948 Print · USGSShasta and Trinity counties are shown here in the late 1940s, capturing the region's deep mining heritage and rugged summit peaks. Genealogists and historians can locate vanished mining camps and landmarks like Deadwood, the Niagara Mine, and Whiskeytown.2 unique versions available - 1948 Map of Weed, 1950 Print
1948 Weed1950 Print · USGSNorthern California and Southern Oregon are captured here during the post-war era, documenting the mountain-and-valley economies of the Klamath and Cascade ranges. Trace the legacy of local mining and timber at the King Solomon Mine, find old schools like Siskiyou County School, and follow the historic Southern Pacific RR route.2 unique versions available - 1949 Map of Blocksburg, 1955 Print
1949 Blocksburg1955 Print · USGSHumboldt County ranching and timberlands are captured here in the late 1940s, showing the remote canyon country before modern development. Genealogists and local historians can locate early family holdings like Cobb Ranch and the vanished Buck Mtn School.2 unique versions available - 1949 Map of Alderpoint, 1955 Print
1949 Alderpoint1955 Print · USGSHumboldt County ranching and timber life are captured here in the late 1940s as the railroad follows the winding Eel River. Researchers can trace old family holdings like Ware Ranch and Marr Ranch or locate the site of the Harris PO and Fort Seward.3 unique versions available - 1950 Map of Weed
1950 Weed1950 Print · USGSSiskiyou County and the surrounding Klamath mountains appear in the mid-century before extensive modern development. Genealogists and local historians can locate remote outposts like the Lee Brown Ranch and the specialized settlement of Darlingtonia. - 1950 Map of Minersville, 1952 Print
1950 Minersville1952 Print · USGSTrinity County's high country and early settlements are captured here in the early 1950s, just before the landscape was transformed by reservoir construction. Genealogists and historians can locate Old Minersville, Ridgeville (Site), and remote mountain locations like Bricks Ranch.4 unique versions available
Showing maps 1-25 of 221
Top cities of Trinity County
- Weaverville historical maps
- Hayfork historical maps
- Lewiston historical maps
- Trinity Village historical maps
- Ruth historical maps
- Zenia historical maps
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