We entered from the Clayton side (right by the oakhurst golf course and country club there is a small trailhead with enough parking for about 5 cars). The hike up is moderately steep but you won’t be disappointed by views from the top. We hiked the coal canyon trail and saw Jim’s place. It’s an old cave that was once occupied by a miner complete with a small sun hole and a spot that once had a stove chimney. We’re also able to see some ruins of the clack diamond shaft. Only some of the brick remains.On another trip we entered from the Antioch side and hiked to the town site of somersville as well as the old pioneer cemetery. You could get to that from either side but you’ll hike longer to get to it from the Clayton side.I have always loved this park because these hills are way more steep and rugged than the surrounding ones. Also the trails in the park aren’t crowded like some of the other east bay parks. Here you can get some quiet and solitude.

I Have gone on many biking trips throughout the area and have explored all the nooks and crannies on foot. This is a great place to go for a run as its a solid distance and has a good amount of uphill for a hardy challenge. Youre congratulated by a stunning view and scenery of wildlife from time to time. The Feeling of relaxation is easy to attain when one ventures into the deeper trails. Treat yourself to a good time and bring a Friend or loved one and plenty of good times shall be had! This Is also a great place to get glimpse of strata for Amateur geologists, a wonderful place to watch birds, and the perfect place to listen to whispers of the wind.

Trail is pretty safe to walk. A bit boring. I had an older person with me. With the lack of trees, walking there on a cloudy day might be preferable. Probably wont come back.

A great place to hike/walk. Varied terrain depending on how challenging/ strenuous you desire. Beautiful views. Best in early spring, fall or early morning / evening. Can get very hot , so bring water and sunscreen! Watch out for snakes.

Wide open spaces in the shadow of Mt Diablo. Really hot in the summer and smokey this summer so wear a mask. Chaparral loop trail is shaded but other areas are open and with little shade, bring plenty of water and take it easy.

Mini hiking trails free entrance at this time no parking fees has a museum I dont know if its open due to co bed lot of old mining towns and some spectacular Ridge Trails

Such a beautiful area especially when its all green and not too hot. The trails and views are amazing. Lots of history up at the cemetery.

Open space. Quiet, has several trails and the scenery is fantastic. A chance to really enjoy the beauty that God created in nature. Very tranquil and peaceful. Great place to workout.

Most of the trails here are moderate level. Come prepared with plenty of water! Beautiful sights if you can handle climbing up to the top of the hills. A lot of narrow trail and walking up/down slippery rock. I took 3 teenagers with me, they greatly enjoyed. Not recommended for younger children though. Definitely recommend shoes with plenty of traction!

Quiet, peaceful, great place to hike even in the pandemic. However, bring water and use the bathroom before you venture out. The regional parks are by far the BEST use of our tax dollars. Fantastic place !!

This place is a hidden treasure,the drive/walk up to the mine is beautiful. Plenty of wildlife to check out. Please bring your own water and dont ever leave your empty bottles!! Thank you

I try to make time to hike hear as much as possible. There is always something intriguing about this area to me. A great way to get your mind off the politics and COVID-19, though I wish people coming here would stop dropping there trash everywhere; I usually pickup what litter I can, but apparently there is more lowlife than I wish to accommodate. PACK ONLY WHAT YOU NEED AND BRING BACK THE TRASH YOU CREATE

The views are to die for from Mount Diablo to the North Bay to the snow-capped Sierras on a clear day. I love the rich mining history here. Wish I could give 5 stars but mountain bikes are relegated to the steep fire roads and I prefer to ride singletrack with gradual grades.

Fun place to hike, lots of different trails. Some shade but on a hot day I definitely recommend going early to avoid peak heat.

This place has some cool hiking trails that get you to some mines that are not operational. There is also a guided tour to take you through a mine.Most of the mines have gates that are closed for public during weekends. Good place to come for a picnic though

Awesome area for an easy hike and mountain bike. Lots of cool points of interest

We enjoy hiking around here. The mines are a lot of fun for the kids. There are some great open trails as well. Not much shade on the main trails through the middle of the park, but still a great way to spend your day.They also have a backpacking site if you’d like to take your young kids on a short backpacking trip.

Very clean and easy hike. Lots of trails to explore

Cant wait to go back and do more trails

We had a great time the tunnel was really cool, definitely need to bring extra water but totally worth it

Nice place to go walking/hiking with your dog. The trails are fairly well kept, but I wish there were more facilities around.

What a great hiking area, many trail options to choose from for all skill levels. Great views. $5.00 dollars to park, $6.00 dollars to go over the Antioch Bridge. Lots of history, the miners tunnels are cool to see. Recommend a hat, sunscreen and water. Looking forward to hiking another section to see the ole towns and Prospect tunnel. Pack a lunch and enjoy.

During springtime it is so beautiful here. The hills are green and it is still cool. Hikes can be a bit challenging for those who are a bit out of shape (like me) but are rewarding. The visitor center is very cool. If you have time, try to make it to Prospect Tunnel to venture 200 feet into an old coal mine tunnel. Lots of wildlife here including coyotes to watch. Can also take your pooch anywhere as long as he is on leash.

GREAT daily workout, could use company, anyone need a hiking buddy to hike around mornings hit me up.

The hiking trails are nice here, but the best part is definitely the underground tours of the old mines.

Love the scenery, and different bird sounds, fresh air. ️

AMAZING PLACE TO HIKE AND RELAXI COME HERE AT LEAST ONCE A WEEK AND I FEEL RE ENERGIZED!!!!THIS PLACE HAS ALSO A VERY INTERESTING HISTORY AND I LOVE ITYOU HAVE TO WALK ALL THE WAY UP THE CEMETERY WHICH IS SO PEACEFUL AND YOU CAN SEE THE MOUNTAINSLOTS OF INFO ON THE PEOPLE THAT LIVED HERE BEFOREI CANT WAIT TO TAKE A TOUR OD THE MINES

Love the trails, especially around the lake. There are nice picnic areas and a boat ramp.

Great hiking experience. Brought a 4 year old and an eight year old and they managed just fine. The stop and powder magazine (see map) were must-sees. Kids had a blast. Didnt get a chance to check out the visitor center or cemetery but will hit those when we inevitably come back. Note: Be sure to bring $5 for parking!

The trails is easier to walk and the hills are beautiful!

The park staff are incredibly knowledgeable and helpful. The park itself is rich with history and great hiking trails. This is really a hidden gem of the east Bay park system.

Great park for short hikes with lots to see!

There is something so relaxing and pure about this place. Loved the quick motorcycle ride through the rolling hills, while thinking of the deep history locked away below.

This is a fabulous place to go hiking. There are many hills of varying difficulty, so you can choose the length and level of your hike. We only covered a small portion of the park (~6 miles) and there was so much to see. There were 5 mining towns on-site although nothing really remains, and there is an old cemetery you can walk through. Also, East Bay also has a nice educational visitors center set up in one of the larger old mines, and they give 90 minute tours inside one of the mines.

In the spring time this area is really amazing with wildflowers, birds, and reptiles. In the summer is the best time to visit the mines as you get to feel the big contrast in temperature from the dry summer heat to the cool damp inside of the mines. Sand mining and coal mining took place at this site, but only the sand mines are accessible via tours for the public due to air quality issues that occur with coal mines. There is a visitor center inside a large room of the sand mine that you can visit without taking a tour, but a tour really allows you to see what was going on there and the shear scale of it was amazing. In the walls of the sand mine there are fossilized tunnels from ancient shrimp, a really cool transition fault line, and some breathtaking rooms. A fair number of picnic tables dapple the area near the parking lot.

Wide open spaces, good trails, parking, and great views. Excellent.

It was a good hike. Not much staff patrolling the park. I had slipped and almost fell into the canyon. I was calling for help and other hikers were able to pull me to safety by my backpack straps and then when we got back to the parking lot, my friends car had been broken into. Also the mine area says open on Saturdays and Sundays, but was locked and we were there on a Sunday

Beautiful with all the rain this year! My we all loved it. The Mine Tour seemed really cool. Next time!

Amazing views of the East Bay in all directions. Great place to spent a spring day. Keep you dogs on a leash so you dont ruin it for other people.

I like it a lot. Plently of parking. Not hard to find. There werent a lot of people there, altough more than I expected on a miday Wednesday. The trails are really well kempt and the bathrooms were nice. I will definately be going back.

So much fun, lots to do and experience of tour mining, learning all the plants and nature, hiking, employees were on top of history, very clean. Pricing was amazingly cheap. All ages was a plus to enjoy.

Picturesque trails for all hiking levels , I recommend this spot.

Seemed like a total hidden gem! Beautiful views, very well marked trail, nice loop with a good steep climb. We went at 4:30pm (park closes at 8pm) and there was no one on the Lougher Loop except us the entire time!

A bit hot in the summer, which can be mitigated with a mine tour. Great place for wildflowers in the spring!

Beautiful place for hiking in the rolling hills.During the summer the grass pretty dry, but after the rains, its green as the eyes can see!

4.01 mi omg Im dying.. so out of shape.. but so beautiful

Great place for hiking or biking especially in the spring. Beautiful view of the delta area! Just dont go off trail because it is full of holes and cow patties lol

Great place to hike and see not only the Nature, but the former coal mines as well.

Excellent place to spend a day with the kids. Very educational about the history of the mines and what the society was like back in the day. Also physically demanding. Enough to wear the little ones out on the hike. I would definitely recommend bringing a stroller or some sort of carrying device for kids on the way back unless you dont mind carrying them

Love the different options of trails. If you want a challenge. Go forward and uphill. Left or right would be easier for beginners. This place is always my perfect getaway

Beautiful views from the trails. I love that they are dog friendly park and that the trails are well mapped out.

Good place for walking, biking, just not very pretty. At least not when I went which was dry summer.

Wonderful place for peaceful hiking and beautiful nature views

There are multiple trails here. Most are moderately challenging with a decent amount of climbing. There are some good views. Overall an enjoyable place to hike.

Great bit of history and Ethan, our tour guide was knowledgeable and engaging. The hiking trails were not too challenging but did have some decent elevation changes. There were some great views of the area.

Go take the tour of the mine. Most of us will never have the experience of being in a former working mine. Its pretty accessible if you live in the Bay area and and also a piece of interesting history.Take a picnic lunch, plenty of water if going in the summer. Hike the area, learn about the five mining towns that used to be there.

Really beautiful this time of year.Plenty of benches, picnic spots, great trails.Good for kids and dogs

Nice place to hike. Check out the mines. Kids need to be 7 to join the tour. Small part is open to all thats where the visitor center is.

Nice place for hiking and the poochies love the walk.

Many trail choices to take, most with plenty of shaded paths which made it a breath of fresh air and by far, one of the easier hikes Ive voyaged lately but its all so worth it, especially when you make it to the top and see an awesome view of the hills, lands, and windmills etc.!!

Beautiful and tranquil. The people working there were extremely friendly and knowledgeable as well.

Super fun we took pictures and saw the minds I highly recommend it

This park will cost you $5 to visit but it is almost a hidden gem. Many people who have lived in the Pittsburg - Antioch area know it is there. However it is not known to many of our friends from as close by as Walnut Creek. The tour of the Coal Mine is pretty neat and dog friendly. There is a new deeper tour opening soon. Im very curious to get in and take the more in-depth tour. There are some nice trails with great views, some that are largely shaded by brush and trees as well as those out in the open grass along the hills. Pack a lunch and enjoy this great place on a clear day.

Beautiful day for a hike! Nice paths and places to explore!

Virtually closed. Hiking trails are open but due to COVID the tours are closed.

Nice wide trails with some good climbing. Many different trails to link up and a few spots for water.

Amazing reginal park. Wonderful for hike up & down hill.

Park is opening slowly but at least I got a chance to go

Nice place to visit. Theres hiking trails. Unfortunately we were not able to take a tour of the mines since the tickets were all sold out. Maybe next time.

It was a beautiful drive in and walk. Im not able to walk very far so I didnt make it to the visitors center or cemetery. However, I had lots to look at with the birds flying overhead and the rocks and geology that interest me. My daughter did visit the cemetery and was impressed by the size and renovations that have been done. My family has previously gone on the mine tour, but those are not handicapped friendly and are currently closed for renovations. There are picnic areas, including BBQs available. A lovely place to visit and see the history of the East Bay and the hard work of our Regional Parks.

Very challenging hilly area to hike. Great view of the surrounding areas and many different roads to take so you can go as short or as far as you can handle. Dog friendly.

If you like hiking, youll love Black Diamond Mines.... I had so much fun! Great place to bring your pet. Beautiful Scenery great trails for beginners also kid friendly. I always go here- give it a try

From a short walk to a strenuous hike, beauty everywhere.

Beautiful rolling hills. Would be especially gorgeous in winter or spring when the grass is green.

Opens to public in March 2019. Informative!

A really fun first experience. I saw two coyote. I went in mind to run the lougher loop trail. Although it was so muddy it prevented me from doing so. The mud would cake on and not come off. After excepting this fact, I had fun slowing down and enjoying the hike. With an extra three pounds of weight per foot, it made for a great work out!

Great place for a hike. Plenty of parking. Trails for all levels.

Hidden Gem, fairly laid back hike.

If you go between March and September you can most likely catch the mine tours. Off season there is still a small museum, gated mine entries, cemetery, and good views. Keep in mind this is on the side of some hills so it is strenuous hikes. To the cemetery its not long (15-20min) but it is all up hill. All of the trails involve uphill hikes, but the views make it worth it.If you arent into uphill hikes but want to see the mines, the walk to the mine visitor center is not strenuous, just make sure you go in the on season otherwise the center wills be closed.

Great place to share with your family and friends

Beautiful trails and lots of fascinating history!

I love this place. Great place to take a beautiful walk. Very dog friendly. The guided mine tour is very cool and educational. Can’t believe it doesn’t cost more. I think it’s only $5. So worth it. Take the time to walk up to Rose Hill Cemetery. Lots of history and an amazing view. Have fun.

Open space, quiet and beautiful scenery for biking and hiking.

Excellent hike, not too strenuous in most parts and very scenic. We found two scorpions under a rock and there are cow pies everywhere, but other than that it was a magnificent trek.

The gates dont close till 8 pm. However the visitor center close at 5. So when we visited, we couldnt even get into the visitor center

Love this place, always have. Never gone on any of the tours, but just for hiking its great. Lots of great trails

Havent been here in years and bought my sons to explore and home around. I really wish the mine tour was running right now but Ill wait until spring when it is and bring my boys back.

Awesome trails to ride your mtb

An amazing mine tour experience. Well well worth it!

Amazing as always!!! 5.6 miles done today

Beautiful local park, has a little bit of everything and is well maintained for a regional park. I gave it a four star since most trails are fire roads with the exception of Corcoran trail. Get and see for yourself.

EBP people are really nice and helpful. Made our experience very fun

Really nice views and lots of open space makes this feel a lot less crowded than other parks. Some nice trails plus you have the mine visitors center and cemetery as added points of interest. Will be back to explore !!

Another great little park to explore! Lots of historical markings and clean pathways and parking.

The coal tunnel and the colors are really nice. Not a very easy hike though.

Great hiking, but make sure you know where you are going before you start and bring plenty of water. It gets hot hot hot. Pro tip: if you need to cool down, the entrance to the mine is like a giant refrigerator. It was awesome and very close to town.

Great place for hiking

Beautiful Mountains and 5rails are endless!

We had an excellent Guide, Virginia that made the place come to life for us!! So much history!

A good 4 mile hike up and around