Granite Mountains (Arizona)

The Granite Mountains of Arizona is a mountain range in the Sonoran Desert of southern Arizona. It is located in extreme western Pima County, Arizona, bordering southeast Yuma County. The Granite Mountains are 17.4 mi (28.0 km) long. This range trends mostly northwest-southeast and it turns midrange northerly to align with the Aguila Mountains of Yuma County 6 mi (9.7 km) north. The Granite Mountains range in width from about 0.8 to 1.6 mi (1.3 to 2.6 km) in width.

The Granite Mountains' highest point is unnamed at 2,490 ft (760 m). The west and south end of the mountains lie at the southeastern beginning of the San Cristobal Valley flowing northwest and north to the Gila River Valley. The east side of the range borders the north-flowing Growler Valley. The southern end of the mountains are adjacent to a water divide where south-flowing drainages enter into portions of northern Sonora, Mexico.