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    Black Diamond Trail

    4.0 (1 review)

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    5 years ago

    Helpful 7
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    Love this 6
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    Mt Diablo Summit - Stairs to the observation deck

    Mt Diablo Summit

    4.3(89 reviews)
    4.3 mi

    This has been on my want to hike list for a long time and I finally got to do it on a perfect day…read more The weather was great, overcast and cool. We hiked it so fast and the views were spectacular. I can't wait to hike this in the spring with all the flowers in bloom. There are so many surrounding trails and I want to do them all! Lots of bathrooms throughout the trail. There is a visitor center at the top which you can drive to also. Please come and creat your own adventure.

    My God-father lives nearby, and he thought this would be a nice little distraction from the…read morebustling cities below. He was right. The drive up was intense. It's been a while since I drove roads similar to this, so it wasn't too bad, up. Hopefully down is OK too. There is a small entry fee (per car), but also a senior discount. So we only had time for the Summit. There are more Yelp! listings for other parts of the park. OK, so I was not prepared for the breathtaking views! It was a slightly hazy, or was it smoggy, day... But the views were still fantastic! If the views were not enough, there is a visitors' center in the light tower at the summit. Inside is lots of information, a Rangers' Station, and several informative and/or interactive displays. And there is camping in Mt Diablo too! To make things even more interesting, we took a different route down. I don't like backtracking, so this was a bonus... And i wasn't too bad.

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    Mt Diablo Summit - There's a stairway up to the museum. If you are looking for the restrooms, they are in the opposite direction across the parking lot.

    There's a stairway up to the museum. If you are looking for the restrooms, they are in the opposite direction across the parking lot.

    Mt Diablo Summit - My Godfather and Thuy

    My Godfather and Thuy

    Mt Diablo Summit

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    Black Diamond Mines Regional Preserve - Visitors Center

    Black Diamond Mines Regional Preserve

    4.7(208 reviews)
    3.9 mi

    We walked a couple of trails, explored the old coal mine, and checked out the cemetery...really…read morefascinating to see how far back those tunnels inside the caves go. The visitor center had a ton of great information and history.

    Exploring the California State Parks list online a number of years ago, I liked the description and…read moremap of Black Diamond Mines Regional Preserve. It was neat in that there were historical building(s), a cemetery, and different parts of mines in addition to the natural landscape, plants, and animals to observe. I visited a few different times in 2018 plus or minus a year. One time I brought my friend Jinsol along and another time I brought family (my mom and dad). The park volunteers/workers were friendly when we encountered them. We appreciated the map(s) of the park, it helped with exploring. Some sites were more readily identifiable than others. My mom had difficulty on some of the steeper trails, though my dad faired well. Some parts of the mines had information displayed though were not open on my visits. One of my visits was during a heat wave, while the remainder were during relatively average weather conditions. Shade was sparse, though present, during the heat wave. Even in the shade however, the heat seemed to spread. On a different occasion I slipped and fell on a pathway that had a small section that was temporarily dominantly mud. A place requiring my full attention for traversing the trail system.

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    Black Diamond Mines Regional Preserve
    Black Diamond Mines Regional Preserve
    Black Diamond Mines Regional Preserve

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    Black Diamond Trail - hiking - Updated May 2026

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