Blackhawk is an unincorporated planned community and census-designated place[3] located in Contra Costa County, California, United States, east of Danville and Oakland.

24-hour security plus additional law enforcement contracted through the Contra Costa County Sheriff's Office is provided by HOA dues.

The area is covered by the San Ramon Valley Fire Protection District.

[needs update] Blackhawk Ranch was established in 1917 by Ansel Mills Easton and his son-in-law William Q.

Ward, in an area east of the San Ramon and Sycamore Valleys.

A group of environmentalists and local residents called Amigos de Diablo organized against the Blackhawk Development Corporation, but were sued for libel.

The Blackhawk Development Corporation finally reduced the number of homes planned to 2400 and offered more than 2,000 acres (8 km2) of open space to Mount Diablo State Park.

In addition to Blackhawk, there are also numerous surrounding communities, including: Opened in 1979, Blackhawk Country Club is a highly exclusive 4,800 acre (19 km2) country club community at the base of Mt.

Diablo where luxurious residential neighborhoods are surrounded by thousands of acres of permanent open lands.

In the middle of Country Club West is the 6,904 yard (6,313 m) Lakeside golf course, designed by Bruce Devlin and Robert Von Hagge.

The newer 6,700 yard (6,126 m) Falls golf course, designed by Ted Robinson, winds through Country Club East.

The Blackhawk Swim Club includes a competition-sized pool, a spa and dressing rooms and offers instructional programs.

The 25 acre (100,000 m2) Sports and Recreation Center includes basketball courts, outdoor volleyball courts, a children's play park, Olympic-sized pool, sports fields and an amphitheater.

[16] Blackhawk is mentioned in the hit song "Salvation" by the punk band Rancid, as a place "where all the rich people hide."