Lehigh Mountain is a mountain in Lehigh County, Pennsylvania, whose main peak reaches 843 feet in Salisbury Township. It stands on the right bank of the Lehigh River and is separated from nearby South Mountain by the headwaters of Trout Creek. Geologically, it belongs to the Reading Prong, a section of the Appalachian Mountains. Its position along the Lehigh River places it within the ridge-and-valley landscape that characterizes this part of eastern Pennsylvania.