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Black Diamond Mines
11 reviews
 3.82 of 5

Several different styles of trails including "The Wall" The park system is too large to really get deep into it. There is a trail for every type of rider. I am an intermediate rider and love the trails in the spring and fall. Summers are too damn hot and dry. Winter the roads are destroyed by cattle. The trails are mostly clay and we just love cleaning that crap off our bikes! You also can go Black diamonds over a ridge and go thru Clayton to get to the ultimate climb Mitchell Canyon!
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Latitude
37.96368875328558
Longitude
-121.90567016601562
Trail Directions
Highway 4 to Somersville Rd. South exit, go approx 4 miles into the hills.
Trail Length
5-20 miles with loops
Trail Level
Advanced
Trail Type
Singletrack & Fire Roads
City/County
Antioch
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Reviews 1 - 5 (11 Reviews Total) View All | Next 5

Review Date
April 28, 2007

Overall Rating
 4 of 5

Aerobic Difficulty
 4 of 5

Technical Difficulty
 2 of 5

Ridden Trail:
Once a week

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Reviewed by: rockymtnrider ,  Weekend Warrior

Summary:
Black Diamond has a lot of different trails. You can ride as far as you want. You can do a short ride of about 10 miles or go trail to trail and you can ride over 25 miles. You can make the ride easy or reverse it and make it even more of a climb. It is a great park to build your skills and muscles. I could bearly ride a hill when I started and now I can ride strong. Still have to walk part of the wall.

I ride Black Diamond about 3 times a week. I live near it and I am so glad I do. I started mountain biking back in January.

Recommended Route:
Old home stead loop to acorn, down the ridge trail. Right onto stewartville trail. Ride it to the wall then up to ridge trail to acorn then left onto old homestead loop finishing the loop.

Other recommended trails in the same area:
Check the trail maps. You have endless number of options. You can ride to clayton from antioch if you have the stamina.



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Review Date
July 4, 2005

Overall Rating
 4 of 5

Aerobic Difficulty
 4 of 5

Technical Difficulty
 3 of 5

Ridden Trail:
Once a week

Visitors rate this review
5.00 of 5, 2 votes

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Reviewed by: ElPedro ,  Cross Country Rider

Summary:
A mostly climbing or descending loop.

Recommended Route:
Short Loop From Frederickson Lane gate. Get over gate and take the trail off to the right. You'll ride a minute or so until you come across a trail called Old Homestead Loop. You take a left here. This is a moderate climb of about 30-40 minutes depending on your speed. About 20 minute in you'll come across another trail. Go to the right. When you get to the top of this hill there will be a trail to the left. Take that and it will lead you to the Ridge trail. When you get to the ridge trail you can go left or right. Left will take you down the Ridge and dumps you onto Stewartsville Trail. Turn left on Stewartsville and this goes back to Frederickson. Right will take you to top of the Ridge where you can look out and see “the Wall”. It’s a steep climb and fast descent. At the bottom of the wall is Stewartsville Trail. Stewartsville will take you back to where you started on Frederickson.

Other recommended trails in the same area:
Long Loop
Same as above with the right turn going to the top of the Ridge. When you’re at the top look right and you’ll see a bench before the bench there’s a gate. Take that and drop down into Black Diamond Mines where. At the bottom of that descent turn left onto the paved road (you can fill up with water if you are low by the picnic tables). Take the dirt road called Nortonville. This road will take you up by the cemetery. At the top of the hill go down Nortonville. At the bottom of this fast downhill turn left. This is a long climb up to a paved road. The road has some steep switchbacks and ends at as a short steep climb near a tower. Keep going straight onto the dirt path. This path will lead you back to the cemetery. Go down the cemetery and retrace your path back to the gate. Bring plenty of water and somthing to eat.



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Review Date
May 1, 2004

Overall Rating
 4 of 5

Aerobic Difficulty
 3 of 5

Technical Difficulty
 3 of 5

Ridden Trail:
Once a week

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Reviewed by: daroy ,  Cross Country Rider

Summary:
Black Diamond Mines or better know as Contra Loma, I work out here a few days a week and would love to show you guys and gals around. It's mostly fire trails and I hate to say it but not the best and outstanding single track. The climbs are great and for sure will get you breathing heavy. The decents are fast and usually smooth. Just go and give it a shot, if you like climbing and decending fast you'll love it. It's also a great place to race around with you friend due to the wide trails!



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Review Date
August 11, 2003

Overall Rating
 4 of 5

Aerobic Difficulty
 5 of 5

Technical Difficulty
 3 of 5

Ridden Trail:
Once a week

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Reviewed by: Kory Bennett ,  Cross Country Rider , from Antioch

Summary:
This is my backyard playground. It is a very good endurance building area. The park is good size, not to mention the land out beyond the park boundary. If you like to climb this is the place. Single tracks can be found and there are more than some may no. I still find little surprises now and then.

Recommended Route:
take james donlan onto silverado then turn on foothill dr. park near the gate. hope the little fence and ride. you will soon have a choice of takink the high road or taking the low road. (GO AHEAD TAKE THE HIGH ROAD) tough guy

Other recommended trails in the same area:
the ride to your moms house. easy climb



Review Date
November 18, 2002

Overall Rating
 4 of 5

Ridden Trail:
Once a week

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Reviewed by: Joseph , from Oalkey CA

Summary:
Enter park no the contra loma side. Ride up stewertville-easy climb good warm up. Then follow to upper oil caynon climb to the top. Brisk climb if your in shape middle chainring. At the top hop the fence to find the greasy devil trail. Ride along the side of the hill through the trees, then some steep tight sections. Worth the climb. Trail dumps you onto a fire road that connects to stewertville trail at the base of the "wall". Then climb up "the wall" to miners trail single track and bomb back down. Good for intermedate or advanced riders.

Recommended Route:
If you would like a little more technical ridding try upper oil caynon to single track back to base of the "wall"

Other recommended trails in the same area:
Rockville, morgan territory,



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Reviews 1 - 5 (11 Reviews Total) View All | Next 5


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