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Briones Hills facts for kids

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Briones Hills
Briones reservoir 46.JPG
Briones Reservoir in the Briones Hills.
Highest point
Elevation 430 m (1,410 ft)
Briones Hills is located in California
Briones Hills
Location in California
Country United States
State California
District Contra Costa County
Range coordinates 37°56′34.725″N 122°8′47.876″W / 37.94297917°N 122.14663222°W / 37.94297917; -122.14663222
Topo map USGS Briones Valley
Type of rock Inner Coast Ranges,
California Coast Ranges System

The Briones Hills form a low mountain range in western Contra Costa County, in the East Bay region of the San Francisco Bay Area, California, United States.


The hills are in the Southern Inner Coast Ranges group of the California Coast Ranges System.

Cities and towns adjacent to or in the foothills of the range include: Briones, Lafayette, Martinez, Orinda, Pleasant Hill, Alhambra Valley, and Walnut Creek.


Briones Regional Park, in the East Bay Regional Park District System, provides hiking trails for access. It also protects some of the range's California oak woodland, chaparral, and riparian habitats.

Briones Reservoir, of the East Bay Municipal Utility District (EBMUD), is located in the western area. It is impounded by Briones Dam on Bear Creek.

The headwaters of Pinole Creek are in the Briones Hills, on the western slope of Costa Peak. The headwaters of Alhambra Creek are in the hills within Briones Regional Park.

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