Gathering strength from tributaries draining the highest mountains in the world the white water on the Sun Koshi is Biblical, even expedition-size rafts disappear into the vastness of crashing waves and rolling, boiling water.

After the monsoon the river is high and wild, and definitely not for the faint-hearted. Whipped foamy white where narrow gorges constrict the river's flow the cataracts are long and powerful. The warm waters of the Sun Koshi surge, snake and wind for 270 km to the east of Nepal.

While the lower sections of large volume rivers are usually rather flat, the Sun Koshi reserves some of its biggest and best rapids for the last days. At the right flow it's an incredible combination of white water, scenery, villages, and truly quiet and introspective evenings on huge sandy beaches along what many people consider to be one of the world's 10 classic river journeys.