Briones Hills
| Briones Hills | |
|---|---|
Briones Reservoir in the Briones Hills | |
| Highest point | |
| Elevation | 430 m (1,410 ft) |
| Geography | |
Location of Briones Hills 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 |
| Topo map | USGS Briones Valley |
| Geology | |
| Rock type(s) | 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 Briones Hills are the northernmost portion of the East Bay Hills, which refers geologically to all of the ranges east of the Bay from the Hayward Fault in the west to the Calaveras Fault in the east. The United States Geological Survey (USGS) Geographic Names Information System, however, includes the Briones Hills as part of the Diablo Range in its list of GPS coordinates for the latter.