The Yamuna, also known as the Jumna or Jamna, is the second largest tributary river of the Ganges and the longest tributary in India. Originating from the Yamunotri Glacier at a height of 6,387 metres on the southwestern slopes of Banderpooch peaks of the Lower Himalaya in Uttarakhand, it travels a total length of 1,376 kilometres and has a drainage system of 366,223 square kilometres, 40.2% of the entire Ganges Basin.