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Contra Costa County

Black Diamond Shaft

Highlight • Historical Site

Black Diamond Shaft

Recommended by 2 mountain bikers

This Highlight is in a protected area

Please check local regulations for: Black Diamond Mines Regional Preserve

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    Best Mountain Biking Routes to Black Diamond Shaft

    4

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    1. Black Diamond & Mount Diablo Trail loop — Black Diamond Mines Regional Preserve

    17.5km

    01:53

    580m

    580m

    Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.

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    Intermediate

    Expert mountain bike ride. Very good fitness required. Suitable for all skill levels.

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    Tips

    January 8, 2024

    This once 150-foot-deep air shaft was put in place to ventilate a coal mine to keep it free from dangerous gasses. There is a short tunnel to access the interior and get a closer look. On the excavation sides, there is still evidence of marks left by the picks from miners.

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      Details

      Informations

      Elevation 420 m

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      Thursday 6 November

      18°C

      12°C

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      Max wind speed: 5.0 km/h

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      Location: Contra Costa County, California, United States

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