The mountain ranges that make up southeastern Arizona’s Sky Islands are high enough and cover enough area to support forests at their higher elevations. Each forested mountaintop is an island unto itself, separated from the others by the surrounding “sea” of desert. The highest of all the Sky Island ranges is the Pinaleños. These mountains have 7,000 feet of vertical relief and are the only Sky Island range that reaches elevations over 10,000 feet. The high point is the summit of Mount Graham at 10,720 feet. The high life, indeed.