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Level: Intermediate
Length: 17 mi (27.4 km)
Surface: Fire Road
Configuration: Network
Elevation: +427/399 ft
Total: 20 riders

Mountain Biking Black Diamond Mines

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#521 of 1,001 mountain bike trails in California
#6,270 in the world

Steep fire road, 17.21 miles if you do every trail. open area with some oak trees. Old mines to check out. Not good in the wet, just gooopy. Good for one gearif you don't mind jogging some.

First added by Juan_Gear on Jun 21, 2005. Last updated May 1, 2020. → add an update
Before you go
  • Drinking water: unknown
  • Lift service: unknown
  • Night riding: unknown
  • Pump track: unknown
  • Restrooms: unknown
  • Fat bike grooming: unknown
  • E-bikes allowed: unknown
  • Fee required: unknown
This trail information is user-generated. Help improve this information by suggesting a correction.
Getting there
Off of Somersville road in Antioch
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Black Diamond Mines Trail map

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Local Info

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Trail checkins

Adam Van Winkle (on Dec 29, 2018)
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Trail conditions

Good (on Dec 29, 2018)
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Mountain Bike Trails Near Antioch, California

| 2 mi
Easiest | 0 mi

Rider questions

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  • Adam Van Winkle

    HOT, dry, bumpy, miserable and close to my heart. I grew up here, and I still take my kids hiking here. Tried to take them riding here but it was much too difficult for them. I now Ride the entry road for training as often as I can since I live near by. The stuartville trail is a real a$$ kicker.

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  • Twiddles

    Went by here on the way home. Nothing but fire road and posted no bikes on single track. In fact no bikes on roads smaller than 8 feet shoulder to shoulder. Don't bother. BTW Lime Ridge is same, videos of riders there are on illegal trails. Lime Ridge is close by.

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  • Adventure girl

    Really can't think of a reason to ride this place unless you live close by and don't want to drive. Steep, boring fire roads and it bakes in the sumer...nuff said.

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  • RobertReed

    Rode this trail this wkend. I'd HAVE to say, S***ED. Nothing but fire trails that are endlessly uphill, then down into canyons. Everywhere you turned to look, the signs said NO BIKES. WWon't go there again.

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  • awinter

    If you attempt this trail, bring plenty of water. Once you drop down into the canyon, you have no wind and hight temps. Its stifling and you will sweat a lot.* Review edited 8/19/2010

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  • raleighman91

    not a fan i agree avoid with it being wet did it last year super sandy in early 06 dont want to know what its like this year with the drought colorado is nicer haha

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  • Juan_Gear

    Forgot to say you can link with Mount Diablo if you are hard core. thats what the skiney mutants tell me

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