Blackhawk is an unincorporated planned community and census-designated place located in Contra Costa County, California, United States, east of Danville and Oakland. Governed by county rules/regulations and a homeowner association (HOA), Blackh...
Alamo is an unincorporated community and census-designated place in Contra Costa County, California, in the United States. It is a suburb located in the San Francisco Bay Area's East Bay region, approximately 28 miles east of San Francisco.
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