South Teton (12,514 feet (3,814 m)) is the fifth highest peak in the Teton Range, Grand Teton National Park, Wyoming. The peak is south of Middle Teton and just west of Cloudveil Dome and is part of the Cathedral Group of high Teton peaks. The 40 miles (64 km) long Teton Range is the youngest mountain chain in the Rocky Mountains, and began their uplift 9 million years ago, during the Miocene.