hiking

dog friendly

birding

trail running

walking

views

nature trips

mountain biking

kid friendly

wildlife

wild flowers

horseback riding

cave

The East Bay Regional Park District began acquiring land for Black Diamond Mines Regional Preserve in the early 1970s. Today, most of the mining district is within the Preserve's nearly 6,096 acres. The area is an ideal location for hiking, picnicking and nature study. Naturalists conduct a variety of programs relating the Preserve's natural and historic resources.

hiking
1 day ago

Excellent hiking area. Trails are marked and easy to navigate. Mines are short but cool. Scenic!

Loved this trail, very clean. Lots of beautiful scenery and very interesting hike!
Would not come here on a hot day, not a lot of shade.

This loop was one of the best hikes I have done in a while. I followed the red trail marker and didn’t take any deviations. Didn’t see any cows or cow poop, horse poop was minimal, and even though it was Memorial weekend Saturday, the people were minimal after passing the cemetery. It offered a nice variety of scenery and landscapes, vast views, trail surfaces, history, and several different geological formations and soil types. Although just outside of Antioch, it seemed much more remote. I will do this one again.

Loved everything about it

I wanted to test out my new pack and poles. Nice day for a quick hike. I saw a young rattlesnake and a baby sunning themselves. A few raptors and a coyote in the distance. No cows, but plenty of evidence. Nice views, but think this trail would be prettier when everything is green.

Gorgeous scenery, varied foliage and flowers, and some beautiful rock paths. Great plant scents and grand vistas...even cows! An enjoyable spring hike.

Beautiful view especially at the beginning couple of miles. Going up the rose hill for a panoramic view of the rolling hills.

Great trail to do especially in spring or winter... Too hot and dry in summer.

hiking
2 months ago

As a fit hiker, I would not categorize this hike as easy. It starts with a gentle to medium climb on Stewartville trail with views of the rolling hills and without shade. Ridge trail gets a big steeper with amazing views of the valley and Suisun Bay. Chaparral Loop trail is about 50% in the shade and is on mostly rock slab which can be slick and tough to gain a foothold heading downhill in some places. The terrain and view on this trail is very different from the trail up. This is a good time of the year to enjoy the green rolling hills. Trails are well marked.

backpacking
2 months ago

Day one backpacking. Great place!

This was a nice hike and if I lived in the area I'd do it often, but it wasn't worth the 45-minute drive. There were tons of very cute cows blocking our trail and the recent rains combined with the cow hoofprints made it a muddy and uneven (but fun) experience. This is definitely a hike to do in winter and early spring as there is no shade and Antioch gets pretty hot in the summer/fall.

This trail is super fun! I brought my 4 year old niece w us and she did great! She did get tired towards the end and after she knocked out in the car lol... but, for people starting hiking, I would suggest it. I’m not in that great of shape and new to hiking and it’s a good starter trail.

hiking
3 months ago

The incline and rough terrain are a bit much to be considered easy. No strollers. Very petty hike and doable if you’re not avoiding inclines (my health app said we climbed 27 floors).

Great views!

Great views!

hiking
3 months ago

Very scenic, you will not be disappointed! I love that I can bring my dog with me up there. I would bring a lunch and sit by the edge to enjoy the view for a few minutes before my trek back down. Bring good hiking shoes for grips....the path vary from smooth to rocky and uneven.

hiking
4 months ago

Pretty good hike. Lots of views. Antioch looks like a decent town from up there.

This was a really nice trail. It's pretty strenuous though I wouldn't consider it super hard. There's a lot of ups and downs on it though and right away you're on a steep incline before it levels out on the top before dropping down a couple more times. It takes you through some different landscapes which is nice and it's a combination of wide trails and single track. Expect a lot of cows to be around but they didn't bother us much. Also saw a coyote and heard several others howling off in the distance. We didn't see many people and it was a beautiful day. This is a nice hike overall and would definitely recommend. I would not go if it's muddy though, the trails would be rough to hike through.

hiking
4 months ago

Great view from the summit!

So beautiful!!!!!

4 months ago

Always a good place to get out and stretch your legs

hiking
4 months ago

There is a kiosk at the entrance to the park which will collect $5/car to enter the park if the kiosk is staffed. When I went on a Saturday in January at 10:30 a.m. though, there was no one at the kiosk so we did not have to pay the entrance free. I would recommend that you expect to pay $5/car in case the kiosk is open when you come though.

Note: The trailhead is not the first parking lot that you see after the kiosk. Drive father down the road into the park to find the trailhead parking lot.

This trail will feel moderate for moderately experienced hikers and will feel difficult for inexperienced hikers or folks who are out of shape. This park reminds me of Briones Regional Park with rolling hills, city views, and lots of cows grazing in the park. Except I saw about twice as many cows here as I did in Briones Regional Park.

Definitely watch your feet for cow feces because it’s pretty much everywhere. I also couldn’t really find a good place to break for lunch midway through the hike, so settled for a scratchy patch of grass in semi-shade in between piles of cow feces.

There is a steep ascent on part of this trail that will freak out inexperienced hikers and make them rethink coming. If you bring a group of people with a mix of hiking experience, this is where you will see the most difference in people’s fitness levels and most likely people will not be able to hike at the same pace as at flatter parts of the trail.

This hike is ideal to do during cold and cloudy weather since there is full sun exposure pretty much the entire trail. Make sure you bring sunscreen, a hat and sunglasses even when going during winter. Also bring plenty of water since the sun will wear you out.

I’m glad I experienced this park, but don’t see myself coming back soon.

hiking
4 months ago

Great hike, very pretty, everything was very green. The kids thought they were dying (19,16,11,9) but had a great time.

5 months ago

I love this trail, and all the trails here at Black Diamond. awesome views, easily attained. my dog loves it too!

hiking
5 months ago

beautiful trails out there, kids liked all the different mines and sights. lower trails are fairly muddy after the rain, but once you get up the hill a bit it is rockier and less muddy.

This is one of my favorite trails in Black Diamond Mines. I like to hit it with my 2 year old son in a hiking carrier near the end of the day. I’m tall and there’s no brush for me to dodge!

The trail is what you make of it. If you take your time, it’s pretty easy after the first mile. I am always up against the park closing, especially in the winter, so I do this as fast as I can. It’s a great workout, if you keep the pace up.

Also the views from the top are amazing. In the early morning you can see the sun reflecting off the delta, in the evening you can see the sun setting with Mt Diablo in the background.

hiking
5 months ago

Trailhead parking in Clayton off Clayton Road. The hike up is not very interesting, dirt road and cow grazing grass hills. However, once to the top enter Black Diamond Mines Reagional Preserve for a much more interesting landscape. Be sure to see the old mining air shaft (waypoint provided) and loop around the ridge for great views and a nice spot to break for lunch.

Great Hike. I did this loop Counter Clockwise. Pretty flat at the start after .7 miles at the switchback too river view trail it starts too climb. Not super steep. Lots of cows. End of the loop is really steep going down.

Some steep parts but nothing to bad. Good trail for the pups and the cemetery is neat!

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