1938 Map of Mount Lincoln

About this map

Breckenridge and the high-altitude mining districts of the Tenmile and Mosquito Ranges are documented here during the late 1930s, showing a landscape defined by extractive industry and the Continental Divide. The map detail traces the intense mineral exploration of the era through dozens of United States Location Monuments, including Uslm 11320 near Climax and Uslm 10782 overlooking Quartsville. These labels represent the legal anchoring of mining claims in a complex vertical environment where the Southern Pacific and Colorado and Southern railroads once navigated steep grades and high passes.