A perennial river, it is fed by the melting snow of the Himalayas in early summer and the monsoon rains in June–September.

The river flows past the towns of Jorethang, Pelling and Legship.

During its final few kilometres, it joins the Teesta River at a confluence[2] known as Tribeni,[3] which is a popular picnic spot.

The Rangeet river has an NHPC hydropower plant with a capacity of 60 megawatts (80,000 hp) in Sikkim.

This article related to a location in the Indian state of Sikkim is a stub.