Nuptse or Nubtse is a mountain in the Khumbu region of the Mahalangur Himal, in the Nepalese Himalayas. It lies two kilometres WSW of Mount Everest. Nubtse is Tibetan for "west peak", as it is the western segment of the Lhotse-Nubtse massif. The summit of Nuptse is extremely dangerous due to loose snow with a lot of hollows, and there are also weakly attached cornices of snow. This provides a barrier to climbing, yet is not sturdy enough for safe climbing.