This once 150 feet 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.

Sue

January 8, 2024

Mountain biking

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.

In the know? Log-in to add a tip for other adventurers!

Routes here

Best routes to Black Diamond Shaft

riders

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

17.5km

01:53

580m

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

Navigate

Send to Phone

Save

Moderate

4.0

(1)

riders

2. Stewartville Trail – Black Diamond Shaft loop from Antioch

27.0km

02:59

830m

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

Navigate

Send to Phone

Save

Moderate

Details

Informations

Elevation 420 m

Weather

See routes here

Take Me There

Add komoot as a preferred source in your Google results

Add now

Location: Contra Costa County, California, United States

Other Popular Places to Check Out

Meridian Ridge Road

Summit Trail

Devil's Pulpit

Old Borges Ranch

Foothills Trail and Borges Ranch Trail junction

Donner Canyon Road

Sandstone caves in Castle Rock formations

Black Point Summit

Mitchell Canyon Visitor Center

Trails End Path - Pine Creek Park Greenway

Eagle Peak Trail, Mt Diablo SP 🗻

Mount Diablo North view ⛰️

Black Diamond Shaft

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

2. Stewartville Trail – Black Diamond Shaft loop from Antioch

Other Popular Places to Check Out

We value your privacy ⛰️

We value your privacy ⛰️