Mount Everest is the Earth's highest mountain, towering at 8,848.86 meters (29,031.7 ft) in the Himalayas on the Nepal-China border, known locally as Sagarmatha (Nepali) or Qomolangma (Tibetan), and is a major challenge for climbers due to its extreme cold, low oxygen, and dangerous conditions, featuring landmarks like the Khumbu Icefall and Hillary Step.