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On Castillero Trail, approaching the ruins. Mine Hill Rotary Furnace used to extract mercury from cinnabar in the early 20th century  

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Quicksilver History Loop

8.0 mi 12.9 km
 13 ROUTE
Almaden Valley, CA

Castillero Trail

1.3 mi 2.0 km
 1
Almaden Valley, CA
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