Black Diamond Mines Regional Preserve
Upper Parking Area
Upper Parking Area
Click the Staging Area/Trail Name above for park information.
City: Antioch Region: EastBay Park: Black Diamond Mines Regional PreservePark Map URL: Click Here
Sunday, April 24, 2016 @ 9:30 AM
Join us for one last hike in Black Diamond before it completely fades to brown. As the weather warms in East County the opportunity to hike here wanes; we'll get one more look at the late season wildflowers on a beautiful hike through the canyons and ridges of the park. A hiker's choice of a moderate 7 mile/2000' or a challenging 10.5 mile/2880', we will meet at the upper parking lot at the end of the road.
Route will be Somersville to the Visitor Center, up the stairs, right on Chapparal Loop, right over bridge, up connector trail to Black Diamond, right on Black Diamond Tr, left on Nortonville, left on Black Diamond Tr, straight onto Coal Canyon. Veer right at top of the hill, then left on Black Diamond Way (paved), continue left on Black Diamond Trail at top of hill, continue for a mile. We'll take a break at the rocks just before Manhattan Canyon Trail.
Continue right on Manhattan Canyon Trail, right over bridge, right on Chapparal loop up the hill and veering left as it becomes Ridge Trail. Shortly after passing the Lower Chapparal loop going down to the left, look for an unmarked single track to the left and follow the arrows staying right until you end up back on Ridge Trail again. Continue left down the hill through the wooden gate until you get to the junction at the metal gate. The hikes split here.
Short hike will turn sharp left down Stewartville, straight through the metal gate and on back to the parking area down to the right. Long hike will continue through the gate and to the left on Ridge, left on Acorn, right on Old Homestead, right on North Portal, right on Ridge back to the metal gate, right through it and down Stewartville, straight through the metal gate and on back to the parking area down to the right.
Dogs welcome, facilities located at the trailhead only. Flour arrows will guide your route and detailed maps available. If you arrive at the entrance kiosk before 9 am you will often get in for free.
Email: [email protected]
Cell Phone: (925) 325-0805
Click Here for a Map
From Highway 4, take exit #26A. Turn right on Somersville Rd and head south 1.4 miles. Continue straight through the entrance gate on Somersville, do not make any turns, following it all the way into the park, about 1.2 miles. Continue past the lower parking area for 1 mile to the end of the road, parking on the right.
The trailhead information on this page was last updated
Thursday, November 30, 2017.
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