2018 Map of San Carlos Reservoir

About this map

San Carlos Reservoir dominates this landscape at the intersection of Gila, Graham, and Pinal counties. Fed by the San Carlos River and Apache Wash from the north, the reservoir is framed by complex desert topography including Flatiron Mesa and Rockhouse Mtn. The map reveals a network of remote access roads such as Coolidge Dam Rd and Indian Rte 3 that navigate through deep drainage systems like Squaw Canyon and Cottonwood Canyon. Historically significant landmarks like Mt Geronimo stand as prominent survey points above the water line. For researchers, the presence of numerous named water sources including Wire-Corral Spring, Quail Spring, and Evans Spring illustrates the vital role of natural hydraulics in this arid region of the San Carlos Indian Reservation.