| Temescal Regional Recreational Area | |
|---|---|
 Lake Temescal and Beach House in Temescal Regional Recreation Area. Image date September 17, 2006 | |
 Interactive map of Temescal Regional Recreational Area | |
| Nearest city | Oakland, California |
| Area | 48 acres (19 ha)[1] |
| Created | 1936 |
| Operated by | East Bay Regional Park District |
Temescal Regional Recreation Area (TRRA), formerlyLake Temescal Regional Park, is aregional park in theBerkeley Hills, in northeasternOakland, California. The TRRA encompasses 48 acres (19 ha), abuttingSR 24,SR13, and the interchange connecting the two highways, southwest of theCaldecott Tunnel.The park is part of theEast Bay Regional Park District (EBRPD).[1]
Lake Temescal was created in 1869, afterAnthony Chabot won a contract to supply the town of Oakland, California with drinking water. Chabot had already become notable by developing a method of extracting gold from the Sierra Nevada mountains with high-pressure water cannons. He decided to use the same technique to construct a reservoir by blasting the walls aboveTemescal Creek, and recovering the dirt and rocks to build an earthen dam across the creek.[2] Chabot had already formed the Contra Costa Water Company to pump water from the proposed reservoir to the Oakland water system.
By 1875, Oakland's population had grown to about 25,000 from about 10,000 when the dam was first completed. It was obvious that Lake Temescal was too small to remain the primary source of the city's water, so Chabot's company moved farther south to construct a much larger reservoir, later named Lake Chabot in Castro Valley. Temescal became only a secondary source.[2]
Lake Temescal is the main attraction in the park, which also offers trails, picnic areas, foresthabitats, andbird watching. The lake was originally constructed as a drinking water reservoir for the city of Oakland. It was one of the first three parks opened to the public in 1936 by theEast Bay Regional Park District (EBRPD).[3]
In 1940, workers supplied by theCivilian Conservation Corps (CCC) constructed an imposing building overlooking the lake. The two-level building, which has since been known asBeach House, can be rented for private events, such as group meetings, receptions and dinners.[4]
37°50′52″N122°13′53″W / 37.84778°N 122.23139°W /37.84778; -122.23139