2022 Map of Prado Dam

About this map

The Prado Flood Control Basin serves as a massive hydrological focal point where the Santa Ana River meets a complex network of canyons and creeks at the intersection of San Bernardino, Orange, and Riverside counties. To the north, the sprawling residential developments of Chino, Chino Hills, and Ontario give way to the rugged topography of the Puente Hills and the Southern Chino Hills. Notable institutional and local landmarks like Boys Republic and Los Serranos sit near Lake Los Serranos, while the vast canyon system—including Telegraph Canyon, Bane Canyon, and Slaughter Canyon—illustrates the transition from the urbanized Inland Empire to the protected open spaces of the Chino Hills State Park region. The landscape is also defined by aviation and industry, anchored by the Chino Airport in the northeast and the heavy transportation corridors of the Corona Expy and Chino Hills Pkwy.