National and State Register

Rocky Mountain Mammoth Mine

Boulder County

The Rocky Mountain Mammoth Mine is significant for its association with the mining industry in the mountains of Boulder County.  As a telluride gold ore producing mine, the Rocky Mountain Mammoth contributed to a major mining revival experienced in the Magnolia Mining district and elsewhere in Boulder County in the late 1890s and early 1900s.

A photo of the multi-colored building with upward protruding section. In the foreground stand several aspen trees.

Rocky Mountain Mammoth Mine

It is an excellent example of a late-nineteenth-century small shaft mine.  The property meets the registration requirements of one property type delineated in the Multiple Property Documentation Form (MPDF): The Mining Industry in Colorado and Amendment to Metal Mining and Tourist Era Resources of Boulder County.