Calling all adrenaline junkies! Gushing down the mountains, the foaming white water stretches with varying rapids (from grade 1 to 4). It is excellent for rafting for both beginners as well as seasoned rafters. Combine rafting with camping beside the Teesta River for the best experience. The River Teesta offers rafting opportunities all around the year. Avoid the monsoon season though. March to June is the ideal season.