mountain biking

nature trips

trail running

horseback riding

dog friendly

wild flowers

kid friendly


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.

4 days ago

It was such a amazing trail and you get to see cows very close , super nice view and a great workout

beautiful views, and decent trails to walk on. one of my favorite spots in the area!

1 month ago

Black diamond is the only good thing about antioch

amazing place with spectacular views.

1 month ago

2 months ago

3 months ago

We hiked during Thanksgiving holiday weekend. The weather was perfect. After the rain all hills were green. The trails were damp but not muddy. The views were gorgeous. The hike was a mildly challenging and fun, it had two significant hills for a total ascent of 1800 feet along 7 miles. We hiked on the Chaparral Trail up to the Ridge Trail and then came down to the Stewartville Town site. We returned up the steep on the single track Miner's Trail that follows along a hill ridge back to the Ridge trail.

4 months ago