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- This event has passed.
Black Diamond Mines – CANCELLED
April 16, 2020 @ 7:30 am - 3:00 pm
![](https://mtdiablobirds.org/wp-content/uploads/2019/11/canyon-wren-6-crop.jpg)
This event is cancelled in line with Contra Costa County and California Shelter-In-Place Directives issued due to the COVID-19 Pandemic. Please, go birding on your own and Stay Safe!