City of Diamond Bar

As with many Southern California communities, Diamond Bar's recorded history began with a Spanish land grant. One of the area's first settlers was Jose de la Luz Linares, who founded Rancho Los Nogales (Ranch of the Walnut Trees) on the 4,340 acres granted to him by Mexican governor Juan Alvarado in 1840. The grant included Brea Canyon and the eastern Walnut Valley, a portion of which became the Diamond Bar Ranch, founded by Frederick E. Lewis II...