, coordinates= , image_skyline=Mount Diablo from San Ramon 1866.jpg, image_caption=A view of Mount Diablo from the San Ramon Valley, map_caption=Location in Contra Costa County and the state of California The Diablo Valley refers to a

valley A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams ove ...

in the

East Bay The East Bay is the eastern region of the San Francisco Bay Area and includes cities along the eastern shores of the San Francisco Bay and San Pablo Bay. The region has grown to include inland communities in Alameda and Contra Costa counties ...

of the

San Francisco Bay Area The San Francisco Bay Area, often referred to as simply the Bay Area, is a populous region surrounding the San Francisco, San Pablo, and Suisun Bay estuaries in Northern California. The Bay Area is defined by the Association of Bay Area Go ...

, to the west/northwest of

Mount Diablo Mount Diablo is a mountain of the Diablo Range, in Contra Costa County of the eastern San Francisco Bay Area in Northern California. It is south of Clayton and northeast of Danville. It is an isolated upthrust peak of , visible from most ...

. The valley contains the cities of Clayton,

Concord Concord may refer to: Meaning "agreement" * Pact or treaty, frequently between nations (indicating a condition of harmony) * Harmony, in music * Agreement (linguistics), a change in the form of a word depending on grammatical features of other ...

, Martinez, Pleasant Hill (home to

Diablo Valley College Diablo Valley College (DVC) is a public community college with campuses in Pleasant Hill and San Ramon in Contra Costa County, California. DVC is one of three public community colleges in the Contra Costa Community College District (along with ...

), most of

Walnut Creek A walnut is the edible seed of a drupe of any tree of the genus ''Juglans'' (family Juglandaceae), particularly the Persian or English walnut, ''Juglans regia''. Although culinarily considered a "nut" and used as such, it is not a true bo ...

(The southern end is a part of the

San Ramon Valley 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. Geography The valley is between the Oakland Hills on the west, and the Diablo Rang ...

) and the CDP of

Pacheco Pacheco is a Portuguese and Spanish name which may refer to: General * Alex Pacheco (born 1958), animal rights activist, co-founder of PETA. *Ángel Pacheco (general) (1793-1869), was an Argentine military officer trained by José de San Martín ...

. The Diablo Valley has a diverse population both ethnically, and

socio-economically Socioeconomics (also known as social economics) is the social science that studies how economic activity affects and is shaped by social processes. In general it analyzes how modern societies progress, stagnate, or regress because of their loc ...

. West of the Diablo Valley lies the

Briones Regional Park Briones Regional Park is a regional park in the East Bay Regional Park District (EBRPD) system, located in the Briones Hills of central Contra Costa County of the San Francisco Bay Area in California. Geography The park is located in rolling h ...

and the

Lamorinda Lamorinda is an area within Contra Costa County, California in the United States. The name is a portmanteau from the names of the three cities that make up the region: Lafayette, Moraga and Orinda. Lamorinda sits east of the Berkeley Hills ...

area.

References

Valleys of Contra Costa County, California Landforms of the San Francisco Bay Area Valleys of California {{ContraCostaCountyCA-geo-stub