Maps of Colorado

1810
Courtesy of University of Texas Libraries

1820
Courtesy of University of Texas Libraries

1850
Courtesy of University of Texas Libraries

1870
Courtesy of University of Texas Libraries

1862 Central Gold Region

1870

1872
Courtesy of Pam Rietsch

1873 Thayer's
Courtesy of Internet Archive

1879 Rand McNally

1884 Nell's
Courtesy of Internet Archive

1895 Rand McNally
Courtesy of Pam Rietsch

Counties

1940 Pictorial

Ute Indian Territory
1868 vs 1972

Turquiose Mines

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This page was last updated 09/18/2026