What is the highest peak of the mountain range that includes the Cumberland Gap?
Cumberland Gap: The Cumberland Gap is a narrow pass through the long ridge of the Cumberland Mountains, within the Appalachian Mountains, near the junction of the U.S. states of Kentucky, Virginia, and Tennessee. Cumberland Mountains:  Their highest peak, with an elevation of 4223 ft above mean sea level, is High Knob, which is located near Norton, Virginia.
High Knob