White water rafting is one of the latest adventure sport in Sikkim. Only the Teesta and Rangit rivers offer long stretches which are ideal for safe rafting. Teesta is graded 4 on the International scale. 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 many challenges to more experienced rafters.

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