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1920s Maps of Trinity County, California

Explore 8 historic maps of Trinity County from the 1920s. These maps offer a rare glimpse into what life looked like during the 1920s — 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 1920s, 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 1920s, 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 1920s. This is your window into the past.

Trinity County, CA maps

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  1. 1920 Map of Cummings
    1920 Map of Cummings
    1920 Cummings
    1920 Print · USGS
    Mendocino 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.
  4. 1920 Map of Covelo
    1920 Map of Covelo
    1920 Covelo
    1920 Print · USGS
    Tracing 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.
  7. 1920 Map of Harris
    1920 Map of Harris
    1920 Harris
    1920 Print · USGS
    Humboldt 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.
  10. 1921 Map of Hoaglin, 1922 Print
    1921 Map of Hoaglin, 1922 Print
    1921 Hoaglin
    1922 Print · USGS
    Trinity 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.
  13. 1922 Map of Island Mountain
    1922 Map of Island Mountain
    1922 Island Mountain
    1922 Print · USGS
    Northern 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.
  16. 1922 Map of China Flat
    1922 Map of China Flat
    1922 China Flat
    1922 Print · USGS
    Northwestern 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.
  19. 1923 Map of Sawyers Bar
    1923 Map of Sawyers Bar
    1923 Sawyers Bar
    1923 Print · USGS
    The 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
  22. 1926 Map of Covelo
    1926 Map of Covelo
    1926 Covelo
    1926 Print · USGS
    The 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
End of results
Showing maps 1-8 of 8

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Frequently asked questions

  • What are the different types of historical maps available for Trinity County?
  • What is the oldest map of Trinity County?
  • Where can I purchase historical maps of Trinity County for my home or office?
  • Where can I download high-res historical maps of Trinity County?
  • Are there historical topographic maps available for Trinity County?
  • Is there historical aerial imagery available for Trinity County?
  • Where are historical maps of Trinity County sourced from?