Mount Lemmon’s peak, at 9,171 feet, is the highest point in the Santa Catalina Mountains and is one of the Sky Islands in Coronado National Forest. Sky Islands offer drastically different environments as the elevation changes rapidly. The Sky Island Scenic Byway is the biological equivalent of driving from the deserts of Mexico to the forests of Canada in a stretch of only 26 miles! Listen to the award-winning Mt. Lemmon Science Tour app to enhance your journey. The app narrates interesting observations and facts, timed perfectly for the drive to the top of Mount Lemmon.