The Bhote Kosi is the steepest river rafted in Nepal. With a gradient of 15m per km.The river carves a steep and direct drop at the top that gradually eases to more placid streams and the calmer pools with a 46-km run at the Lamosunga dam. The rapids here are class IV- V at high flow, and III at lower levels.The Bhote Koshi is used for both rafting and kayaking. The river is steep and continuous with one rapid leading into another.