Woman hiker scrambles up the steep route leading to the summit of Picketpost Mountain (4,378 ft) in the Tonto National Forest near Superior, Arizona November 2017. The sheer cliffs of the mountain border the 800-mile Arizona Trail just east of the Phoenix Metro Area. A iron wrought bench and mail box holding the summit register can be found on the rocky summit. The mountainâs unusual name stems from an early military camp established at the base of the mountain by General George Stoneman in 1870. The soldiers nicknamed the mountain âPicket Postâ due to its usage as a sentinel point to guard their camp from attacks. This military camp eventually grew into the present day town of Superior.