The tailings from a mine spill down the hillside adjacent to Castle Rock near Blackhawk, Colorado. Railroad tracks wind around the bottom of the hillside in the foreground. A large ranch, possibly that of the Gundy family (a Gilpin County pioneer...
Blackhawk (Colo.)--1890-1910.; Quartz Valley (Colo.)--1890-1910.; Mining--Colorado--Gilpin County--1890-1910.; Ranches--Colorado--Gilpin County--1890-1910.
[between 1899 and 1910?]
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