Browse Items (1410 total)

That portion of Wyoming that lies West of the Continental Divide and North of 42 degrees, was part of Oregon territory from 1848 to 1859. This 1853 map by J. H. Colton of New York incorrectly places the Tetons and contains many errors relating to…

Colton's 1868 map depicts the Union Pacific Railroad construction as reaching the Rawlins area. What later became Wyoming is part of the Dakota territory, just prior to being granted its own territorial status. Freemont's Peak is incorrectly…

A map prepared by Lt. Warren, Army Topographical Engineer, to accompany a report to Congress on his mapping expedition of 1855 to the Dakotas, including portions of present-day Wyoming. Warren rose to the rank of Major General during the Civil War.

What appears here as the "Yellowstone Park Timber Land Reserve," just East of the National Park, was set aside by President Benjamin Harrison in 1891. Later, it was renamed the Shoshone National Forest. This circa 1903 Cram map shows the Burlington…

An 1869 Colton map of the new Wyoming territory without delineation of the five counties. The map does not reflect the abandonment of the Bozeman Trail Forts. It errs in placing a "Ft. Hall" on the Medicine Bow River, when its true location was far…

The thirteen counties of Wyoming as they appeared when statehood was achieved in 1890.

The counties of Weston and Big Horn were created by the eleventh legislative assembly in March of 1890, just before Wyoming achieved statehood that July. This map by George F. Cram of Chicago shows the new counties, bringing the total to thirteen.…

For the fourteen-month period from March 2, 1863, to May 26, 1864, the area that is now Wyoming was part of Idaho territory. On the same 1864 date, Montana became a territory. Sparse population made these jurisdictional changes of little importance.