The valley contains the cities of Clayton, Concord, Martinez, the unincorporated area of Pacheco, Pleasant Hill, which is home to Diablo Valley College, and most of Walnut Creek, however the southern end of Walnut Creek is a part of San Ramon Valley.
The valley contains the cities of Clayton. Clayton is Concord. Concord is Martinez. Clayton, Concord, Martinez is the unincorporated area of Pacheco, Pleasant Hill. The unincorporated area of Pacheco, Pleasant Hill is home to Diablo Valley College. Most of Walnut Creek the southern end of Walnut Creek is a part of San Ramon Valley. This is however.