White water rafting is a later entrant of adventure sport in Sikkim. Only the Teesta and Rangit rivers offer long stretches which are ideal for safe rafting. Teesta has been graded on the International scale at Grade 4. The icy cold waters of the rugged Teesta have a series of rapids with varying intensity and character. It offers one of the finest rafting stretches in the world. Rangit, a tributary of the Teesta, has more turbulent waters and offers a challenge to more experienced rafters.

On both the rivers, the riverbanks have deep forests, with some patches of terraced cultivation, and small villages. Plenty of white sandy beaches exist, offering good campsites. Rapids of classification 2 to 4 are interspersed with placid floats, making rafting an enjoyable experience. Facilities for overnight River beach camping is available. Beginners as well as experienced adventurers can seek the assistance of the Department of Tourism and travel agents for arranging river rafting trips .