Breckenridge serves as the central hub of this high-alpine landscape, where the Blue River flows through a valley defined by intensive mineral extraction and modern recreation. The eastern slopes are densely pocketed with legacy mining sites, including the extensive workings of the Wellington Mine, Siam Mountain Mine, and the Commodore Placer Mine. These industrial remnants sit alongside the Breckenridge Ski Area, illustrating the 21st-century transition of the Tenmile Range from a mining district to a premiere destination for winter sports.
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1889 · Leadville
USGS Topo · 1:125,000
1891 · Leadville
USGS Topo · 1:125,000
1924 · Montezuma
USGS Topo · 1:62,500
1926 · Montezuma
USGS Topo · 1:62,500
1929 · Dillon
USGS Topo · 1:62,500
1933 · Montezuma
USGS Topo · 1:62,500
1934 · Climax
USGS Topo · 1:48,000
1934 · Dillon
USGS Topo · 1:62,500
1937 · Como
USGS Topo · 1:62,500
1938 · Mt. Lincoln
USGS Topo · 1:48,000