MAP OF UTAH TERRITORY showing the Roads connecting it with CALIFORNIA AND THE EAST compiled in the Bureau of Topogr Engrs of the War Departmt From the latest and most reliable data 1858 Lith of Ritchie & Dunnavant, Richmond, Vt

The Utah Territory was organized in September 1850, on the same day that California became a state. As large numbers of migrants traveling to California led to increased hostilities with Mormon settlers, the U.S. Army sent men into the region. James H. Simpson (b. 1813), a graduate of the U.S. Military Academy who served with the Topographical Engineers, arrived in Utah in 1858 and began conducting a reconnaissance for a new route to California. He drew this map later that year, after winter weather precluded further work in the field. The map extends from 34° to about 44° latitude, and from below 105° to about 122° longitude west of Greenwich.
Simpson based the geography of this map on maps drawn by John C. Frémont (1848), H. Stansbury and J. W. Gunnison (1849), Gunnison (1853), E. G. Beckworth (1854), R. S. Williamson and J. G. Parke (1854), and J. Kirke (1857). He included wagon roads, proposed roads, and the routes taken by Fremont, Stansbury and Gunnison, and Gunnison and Beckworth. Lake Tahoe is here named Lake Bigler in honor of John Bigler, the third governor of California.
Currently not on view
date made
Physical Description
paper (overall material)
overall: 33 in x 45 in; 83.82 cm x 114.3 cm
ID Number
accession number
catalog number
Credit Line
National Archives and Records Service
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Medicine and Science: Physical Sciences
Measuring & Mapping
Prints from the Physical Sciences Collection
Data Source
National Museum of American History


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