Mount Everest (Sagarmatha in Nepali, Chomolungma in Tibetan) stands as Earth's highest mountain. Its summit reaches 8,848.86 meters (29,031.7 feet) above sea level. The peak straddles the border between Nepal and the Tibet Autonomous Region of China, within the Mahalangur Himal sub‑range of the Himalayas. First summited by Edmund Hillary and Tenzing Norgay in 1953, it remains the ultimate mountaineering challenge.