Which Himalayan peak forms the eastern anchor of the main Himalayan arc?

Namcha Barwa forms the eastern anchor of the main Himalayan arc.

Namcha Barwa rises to 7,782 metres in southeastern Tibet, near the great bend of the Yarlung Tsangpo River. The river turns sharply around the mountain and then enters India as the Siang or Dihang before becoming the Brahmaputra. This immense gorge is one of the defining geographic features of the eastern Himalaya.

The mountain is often described as the eastern syntaxis of the Himalayas, where the mountain system changes direction and connects with ranges extending toward Myanmar. Its position and steep relief make it a landmark of the eastern end of the Himalayan chain.

Namcha Barwa was long considered one of the highest unclimbed peaks, but a Chinese-Tibetan expedition reached its summit in 1992. The mountain is not the easternmost high point of every related range, so descriptions of it as the Himalayas’ “eastern anchor” refer specifically to the main Himalayan arc.