Glacier Systems in Leadville, 1911
A map from the USGS Leadville quadrangle (1911) of the central Rock Mountains of Colorado showing evidence of the extent of the former glacier systems in parts of the Park (east) and the Sawatch (west) ranges of Colorado....

Mesa de Maya, 1911
A contour map from 1911 of Mesa de Mays in Animas County, southern Colorado. The map shows the typical topography of a lava–capped mesa, with steep bordering scarps and a flattish summit....

Colorado, 1911
A map from 1911 of Colorado showing the State capital of Denver, counties and county seats, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers. A grid reference in the margins of the map lists counties, princ...

Colorado, 1914
A map from 1914 of Colorado showing the State capital of Denver, counties and county seats, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers. A grid reference in the left margin of the map lists counties, p...

Denver, Colorado, 1914
A street map from 1914 of Denver, Colorado, showing roads, railroads, waterways, and landmarks....

Denver and Vicinity, 1916
A map from 1916 of the Denver and Central Rocky Mountain area showing the railroad routes into the mining areas and south to Pueblo and the southern routes of the Atchison Topeka and Santa Fe Railway....

Colorado, 1919
A map from 1919 of Colorado showing the State capital of Denver, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers....

Colorado, 1920
A map from 1920 of Colorado showing the State capital of Denver, counties and county seats, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers....

Colorado, 1920
A map from 1920 of Colorado showing the State capital of Denver, counties and county seats, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers....

Colorado, 1920
A map from 1920 of Colorado showing the State capital of Denver, counties and county seats, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers. A grid reference in the margins of the map lists counties, princ...