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Catherine Tunnel, the ruins of an old mining tunnel.
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Mine Hill Trail winds through hilly wooded terrain in east Quicksilver Park.
The Santa Cruz Mountains with Mt. Umunhum, 3,489 ft., at the far left, its summit in the clouds. Seen looking southwest on Castillero Trail on a bright, crisp December afternoon.
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Joan Pendleton
Dec 23, 2016 near Almaden Valley, CA
“Catherine Tunnel, the ruins of an old mining tunnel.”  

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Catherine Tunnel, the ruins of an old mining tunnel.
The Santa Cruz Mountains with Mt. Umunhum, 3,489 ft., at the far left, its summit in the clouds. Seen looking southwest on Castillero Trail on a bright, crisp December afternoon.
This is the view approaching the remnants of April Trestle on April Trail. Mining ore cars brought cinnabar (mercury ore) out of the April Tunnel at the left end of April Trestle.
April Trestle (remnants seen here) carried cinnabar (mercury ore) in mining cars out of April Tunnel, which cut deep into Mine Hill.
A winter day on Castillero Trail.
View looking northwest up the peninsula from Castillero Trail.
Powder House (restored) was where blasting powder (used to make mine tunnels, shafts, etc.) was kept.
Mine Hill Trail winds through hilly wooded terrain in east Quicksilver Park.
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Nearby

Quicksilver History Loop

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Catherine Tunnel Spur

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