The Bay Nature events calendar features events sponsored by Bay Area nature organizations from Sonoma to Santa Cruz. Find guided hikes, learn about Bay Area wildlife, enjoy nature festivals, and more!

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Black Diamond Mines Halloween Hike

Saturday, October 26 @ 9:00 am - 11:00 am

Come celebrate Halloween on the trails of Black Diamond Mines Regional Preserve; costumes are optional but encouraged! Referring to an essential fuel source (coal) for the burgeoning Bay Area of the mid 1800s, Black Diamond Mines has beautiful scenery and a long-standing history of industry. The preserve traverses areas of grassland, foothill woodland, mixed evergreen forest, chaparral, stream vegetation, and exotic plantings introduced by coal miners. Be sure to bring plenty of water and a snack, and dress in layers. Sturdy shoes or hiking boots are recommended. Heavy rain cancels.

RVSP: To allow everyone equal access in signing up, registration for this hike will open two months prior to the hike.

***There will be a $5 park entrance fee when the kiosk is attended

Land: East Bay Regional Park District

Rating: Easy/Moderate

Distance: 3.5 miles

Elevation change: 300’

Leader: Save Mount Diablo Hike Leader Jean Vieth

Meet: Somersville Staging Area

Directions: Take Highway 4 to the Somersville Road exit in Antioch, then drive south (toward the hills) on Somersville Road to the preserve entrance.


Saturday, October 26
9:00 am - 11:00 am
Event Categories:
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Save Mount Diablo
(925) 947-3535


Your Name (this will not appear on the event listing)


Black Diamond Mines
5175 Somersville Road, Antioch, CA 94509 + Google Map
(510) 544-2750