Rock City, California
Encyclopedia
Rock City is a camping & hiking zone in Contra Costa County
, California
, United States
. It lies at an elevation of 1545 feet (471 m). The ZIP Code is 94528. The community is inside area code 925
.
Contra Costa County, California
Contra Costa County is a primarily suburban county in the San Francisco Bay Area of the U.S. state of California. As of the 2010 census, it had a population of 1,049,025...
, California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It lies at an elevation of 1545 feet (471 m). The ZIP Code is 94528. The community is inside area code 925
Area code 925
In the North American Numbering Plan , area code 925 is an area code that covers the inland portions of the East Bay counties of Alameda and Contra Costa in northern California....
.