Middle Teton, a 12,809-foot summit in Wyoming’s Teton Range within Grand Teton National Park, rises just southwest of Grand Teton and ranks as the range’s third-highest peak. Separated by the Lower Saddle, it is a classic pyramidal alpine mountain shaped by uplift beginning about 9 million years ago and later glaciation, which carved its steep eastern face and left the Middle Teton Glacier. A prominent black dike, a basaltic intrusion, marks its upper slopes. The peak also holds an important climbing legacy, including Albert R. Ellingwood’s first recorded ascent in 1923 and the classic Middle Teton Glacier route first climbed in 1944.