Rangeet or Rangit (Nepali: रंगीत) is a tributary of the Teesta river, the largest river in the Indian state of Sikkim. The Rangeet river originates in the Himalayan mountains in West Sikkim district. A perennial river, it is fed by the melting snow of the Himalayas in early summer and the monsoon rains in July–August. It is popular among rafting enthusiasts owing to its turbulent waters. The river flows past the towns of Jorethang, Pelling and Legship. During its final few kilometres, it forms the boundary between West Bengal (Darjeeling District) and Sikkim. The tortuous river joins the Teesta river at Teesta Bazaar on the border of West Bengal and Sikkim. The Rangeet river has a NHPC hydel power plant of 60 MW capacity in Sikkim.[1]