San Ramon Valley
Coordinates: 37°45′N 121°57′W / 37.75°N 121.95°W The San Ramon Valley is a valley and region in Contra Costa County and Alameda County, in the East Bay region of the San Francisco Bay Area in northern California.
The valley is between the Oakland Hills on the west, and the Diablo Range on the east.
The valley's population is around 130,000 people.
The cities of San Ramon, Danville and Alamo as well as the southern edge of Walnut Creek are located in the valley, as are the census-designated places (CDPs) of Camino Tassajara, Blackhawk and Diablo.
Interstate 680 serves as the primary transportation route for the area.
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