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We knew we were getting close when the signs by the river warned of contaminated fish.

After a brutal uphill grunt, we found miles of wonderful trails, and the entrance to the New Almaden mercury mines – 100 miles of tunnels in total.

The mining began in 1845 when Mexican Cavalry Captain Castillero discovered that the red rock used by the local Ohlone Indians to paint their faces and the walls of the Santa Clara Mission was cinnabar, an ore of mercury and sulfur. They needed mercury to process silver in the Mexican silver mines.

This mercury mine produced more fortune than any Californian gold mine in history… despite the “gold rush” marketing.

To separate gold or silver from crushed ore, they used mercury.

11 responses to “Quicksilver Mine Ride”

  1. More important than the usage of the mercury in the early gold mining of placer deposits, was the strategic importance of the mercury to the civil war. Explosives state of the art munitions at that time were dependent upon fulmanated mercury, and this mine and the guadalope depost the ridge over from where you are, a currently still active mine, were vital supplies to the north to beat the south.

    I use to run around these mines as a kid, but this one looks like a tourist mock-up, as it is in way too good a shape. Those are fresh timbers with preservative.

    Those that want to know more can read some of the historical information found here: http://www.jstor.org/pss/25160617

    Did you find any strawberries while you were there? Not the fruit, but the mercury type? They litter the creek.

  2. What? I thought all mines were clean and idyllic like this?

    I biked down it, and they have it sealed off a bit farther down. The view there:

    Certainly refurbished since then.

  3. Go up Hicks Road on the other side of the ridge to Guadalupe Mines Road. Its a great climb up the winding road, but you will wind through a whole bunch of old mines and tunnels before you get to the Guadalupe Reservoir. You can ride all the way up to Mt Uminum, part of the Nike Missile radar system that use to be perched atop Mt Loma Prieta. There is another Nike site up there too! They took the antenna and radar system down I think before you moved to the area. You can ride all the way down summit road which turns into skyline, and take that back to Alpine road and back to your house. A big ride, but you will really get to see the area. I you turn left off summit before teh old store, that is Soquel Road, and you can take that to downtown Capitola.

  4. Just saw the photo. Now that picture brings back memories. How far did you go in? Lots of asbestos in the rock, so if you go exploring, bring a mask. We use to go just to pick up old blasting caps for the 4th of July. There and the old Kaiser cement plant quarry were the best places as a kid in the valley to get your hands on explosives, if you couldn’t make them yourself.

  5. grinning ear to ear… this is why I love you man!

  6. You biked into the mine? I’m claustrophobic just imagining it and seeing that photo. Yikes. I need to step outside. Pretty neat… but yeesh.

  7. Wow! What a discovery!

    RocketMavericks: I’ve hiked those trails upto Loma Prieta, but didn’t know about the mines…another Wow! BTW, Alpine ends on PageMill, which then intersects Skyline.

    Sorry Steve, I’ve been tardy on getting myself a Warshawsky-Jurvetson grade Mtn. bike…!

  8. I saw a "Dirty Jobs" program on Discovery Channel about closing mines in Northern California. There are apparently thousands of them. The one shown in the program was a vertical shaft. The crew went down into the mine to ensure there was no living things in it (like people) and then they mixed up a foam chemical and used it to cap the mine, covering it with dirt to hide it. If the VC business, Steve, ever slows down, this could be a new career for you…

  9. a nice aged tequila…

    tifotter: yes, but you can’t go very far in.

    drona: just got back from Montebello. The coyotes seem to be eating well this year.

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