Quail Lake in California is an artificial lake in Los Angeles County, California. Situated in the San Andreas Rift Zone along the north side of State Route 138, it is a regulatory storage body for the West Branch California Aqueduct. The community of Centennial is a proposed 12,323-acre master-planned community that will be built on a portion of Tejo…Quail Lake in California is an artificial lake in Los Angeles County, California. Situated in the San Andreas Rift Zone along the north side of State Route 138, it is a regulatory storage body for the West Branch California Aqueduct. The community of Centennial is a proposed 12,323-acre master-planned community that will be built on a portion of Tejon Ranch to the northeast of the lake.