“Colton’s Utah & Colorado.” New York: G.W. & C.B. Colton, 1872. 12 3/4 x 15 1/2. Lithograph. Original hand color. Some minor chips and tears at edges, but overall very good condition.
A rare map showing the territories of Utah and Colorado together, appearing only in a couple years of the Colton atlas. This map was issued shortly after Denver became connected by rail to the East and with the trans-continental railroad, the beginning of a period of considerable growth in Colorado. In 1870, Denver the Denver Pacific line was completed from Denver to Cheyenne, through which ran the Union Pacific Railroad. That same year, the Kansas Pacific completed their line from Kansas City to Denver across the Prairies. This map show both these lines, the trans-continental railroad, as well as the Denver & Rio Grande to Pueblo and then Canyon City and another line from Denver to Georgetown. The political depiction in the two territories is interesting. Utah has considerable development in the area around Salt Lake City and the Great Salt Lake, while most of the south east is broken into only four counties. Colorado has only two large counties in the northwest, Lake and Summit, which are characterized on the map as “Elevated plain, fertile, gently rolling with fresh water lakes and timber.” Quite a bit of information is given for southern Wyoming, including Fort Laramie and the South Pass. A rare map for the collector or anyone interested in the history of the central Rockies.