Black Diamond Mines - Trail, Antioch, California

Black Diamond Mines - Trail, Antioch, California

DESCRIPTION

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!

USER REVIEWS

Showing 1-10 of 15  
[Jun 24, 2013]
Wiplash
Cross Country Rider

Great trails for beginner to intermediate riders. I ride these trails about twice a week.

Similar Products Used:

I like the Stewartville trail

OVERALL
RATING
5
VALUE
RATING
3
[Jul 31, 2012]
The Grouch
Weekend Warrior

Like everyone else already said , fireroads that never seem to stop, and no shade. So bring lots of water in the summer months. A good place to train but don't waste your time making a special trip out here.

Customer Service

I think you should try and ride up the wall to test your skills.

OVERALL
RATING
3
VALUE
RATING
5
[Jun 28, 2012]
Dirttrackin280h
Weekend Warrior

As others have mentioned this place is a good workout to build stamina and strength on those long steep climbs. You can piece together a pretty fun loop with some single track once you know your way around the preserve. When I first rode this place years ago, I used to have to walk most of the hills here, now I can officially say I can clear anything and everything...on a 33lb. 6" full suspension bike!
There's always a fair amount of cars parked in the Frederickson staging area but since the place is big, people are spread out. I think most people park there and walk into Contra Loma since it's free to park.
During the winter months the trails are pretty damaged due to the cattle. Spring time is your best bet for smooth trails and summer is nice if you can withstand the heat and dry dirt.

Customer Service

A nice loop with some single track is to start off at Frederickson Lane staging, take the Stewartville Trail (starts out as gravel) up the hill until you see Ridge Trail on the right side, climb Ridge trail (beginners you WILL walk it, it can be a tough climb) and take it all the way up until you see Corcoran Mine Trail which will be a quick left...this trail is legal to bikes. It may look single track because it doesn't get much use, but hold on because this can be a fast and rough downhill section. Very fun on a 6" full suspension bike. This is the most challenging and funnest trail for bikes in the preserve...So once you have taken Corcoran all the way to the bottom, there will be a "T", go right onto Stewartville Trail. Continue until you see Upper Oil Canyon Trail to your left. This is a nice climb, if you're a beginner you may find yourself walking it. Climb all the way to the top to where you will see a Oil Canyon Trail on the left. This is a nice quick single track section (bike's aren't legal, ride at your own risk!) that will loop you to Lower Oil Canyon Trail and then back onto Stewartville Trail back to Frederickson Lane to the car. There's many ways to change up the loop or to create others. There's a lot of trails!

Similar Products Used:

Mt. Diablo. Lime Ridge

OVERALL
RATING
4
VALUE
RATING
4
[Sep 16, 2010]
Ugat Bayag
Cross Country Rider

Awesome trail, Climbs are awesome, some illegal single track or should i say half tracks they are great just dnt fall, best time to ride is early morning summer time and late afternoon at fall bring your headlight for some sweet nightride. This trail is not that big but very good foe conditioning and endurance challenge.You gonna hate January up to april ride here muddy pot holes other than that this trail is excellent. come summer time they flatten every single loop for a smooth ride til rainy season come.

Customer Service

Ridge loop right on lark straight toward old homestead loop. or ridgre left on corcoran right on stewrtville up the wall and right on no bike single track.

OVERALL
RATING
5
VALUE
RATING
5
[Oct 06, 2009]
Ron Wilcoxen
Weekend Warrior

Started at staging area just past downtown Clayton @ the golf course. Rode up Cumberland Trail to park entrance @ Black Diamond Way (paved trail); continued counter-clockwise on BDW to Cemetery and on to the Main Staging Area/Parking Lot at the end of Somersville Rd.. Returned to Cumberland via Nortonville Trail/BDW. The park is beautiful. I agree that it would be best in Spring/Fall. Our day was a crisp Fall day. No hoof prints. about 14 miles distance.

Similar Products Used:

Mitchell Canyon/Mt. Diablo

OVERALL
RATING
4
VALUE
RATING
4
[Jul 26, 2009]
stepenliem
Cross Country Rider

I live around this park and hit the trails there a few times a week. Other reviewers are right in saying that these trails are non technical (with the exception of Corcoran Mine trail), but they will test your endurance though. I have been to many mtb trails in the bay area including Santa Cruz, Marin, Mt Diablo, Tahoe, etc, I can definitely say that Black Diamond is the hardest in term of physical endurance. For those who complain that they are not challenging enough, I dare you to try this:
Go ride the trails between January and March when there are a lot of rains and the cows trampled all over the trails. Its extremely technical to go down or up on a trail that have millions of holes half a foot or even a foot deep. Riding Black Diamond during those months is like riding the surface of the moon. Oh.. did I mentioned that those holes are all sticky mud? I usually switch my tires from 2.1 to at least 2.35 inch to ride during the winter months. If you can complete any trail during those worst months, I will buy you a beer!!

Customer Service

Go up North Ridge from the Frederickson street entrance, all they way up to the very top. When you descend from the top, take a trail that go to your right, and then another right up. Go follow that trail, it will take you to a wild, long and the steepest descent in the park. That will take you back to the gate. Total distance: 5 miles. Bonus point: do this route in February after heavy rain!

OVERALL
RATING
5
VALUE
RATING
5
[Apr 28, 2007]
rockymtnrider
Weekend Warrior

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.

Customer Service

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.

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Check the trail maps. You have endless number of options. You can ride to clayton from antioch if you have the stamina.

OVERALL
RATING
4
VALUE
RATING
4
[Jul 04, 2005]
ElPedro
Cross Country Rider

A mostly climbing or descending loop.

Customer Service

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.

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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.

OVERALL
RATING
4
VALUE
RATING
4
[May 01, 2004]
daroy
Cross Country Rider

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!

OVERALL
RATING
4
VALUE
RATING
3
[Aug 11, 2003]
Kory Bennett
Cross Country Rider

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.

Customer Service

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

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the ride to your moms house. easy climb

OVERALL
RATING
4
VALUE
RATING
5
Showing 1-10 of 15  

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