Explore the most popular trail running trails in Black Diamond Mines Regional Park with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

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.

1 month 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.

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.

2 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!

2 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.

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.

3 months ago

Great view from the summit!

So beautiful!!!!!

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.

4 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!

Awesome for families and pets! Great view points and panoramic views. Highly suggest for all ages and fitness levels

5 months ago

Incredible views of east contra costa county. Lots of coyotes, cows, hawks and wild turkeys along the route. Will definitely be back to do this again.

Great view from up here!!

My kids and I favorite trail here ❤️

7 months ago

AWESOME Hike, Intense Up Hill That Last A Good While . Took My Dog, He Loved It . Be Aware If Wild Life, No Problem With The Squirrels But We Did Encounter A Rattle Snake

7 months ago

Great trail, very scenic, definitely challenging. There is very little sun cover, so bring plenty of water and sun protection. When you get to the first fork, go straight instead of up the giant hill on the left, you have enough of a challenge later. Enjoy the views and the natural beauty because it is quite something out there. Be sure to keep an eye out for the ridge trail to loop you back to the cars (if you strictly follow the Stewartville trail signs, you will find yourself on a not so scenic 1.6 mile detour that is not worth it). Please note, that the ridge trail is definitely the challenging part of the "loop", so save some energy and water for it. Also be warned, if you're planning on bringing your dog, keep him/her on leash as we did encounter a rattlesnake today (this also being the reason for docking one star). Overall, we had a great adventure but were slightly unprepared. Enjoy!

Enjoyed this hike! Definitely has a few areas where you can go where it can be more challenging or easier depending on what you are looking for. Awesome place for pups! Only negatory would be the very few shade spots.

very good views on this trail and the rocky points are lovely....

11 months ago

Did see a coyote on this trail. Not as well marked as other trails, but still a nice hike!

overall good but long day if you bring the kiddos. our little one, 8yrs had a couple break downs due to the heat but we ended up back at the car finishing 6.75 miles. Got a tad lost in the beginning, the trail wasn't clearly marked at the start. Nice views, would do again.

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