San Ramon Valley
Coordinates: 37°45′N 121°57′W / 37.75°N 121.95°W[1] The San Ramon Valley is a region in Contra Costa County and Alameda County, California, east of Oakland, with a population near 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. Interstate 680 serves as the primary transportation route for the area.