The Tamur offers six days of fabulous and challenging whitewater (Class 4) in a remote and scenic valley in eastern Nepal, coupled with a highly scenic trek. The river is at its best in medium flows – it would be a nightmare at high levels – with the optimum time (after a normal monsoon) being late October to late November. Note that the final day of the trip from Mulghat (where a highway crosses the river) can be added as an exciting extra day to a Sun Koshi trip.
The trip starts with a 20hr bus ride to Basantapur, via Dharan followed by a four-day walk in along a high ridge with wide panoramas of Kanchenjunga and the Everest peaks – often described as one of the most beautiful treks in Nepal. It is possible to fly from Kathmandu to Taplejung, only a couple of hours’ hike from the put-in point at Dobhan, but flights may be delayed by weather, so it’s more reliable to fly to Biratnagar and then take a taxi or bus from there to the Basantapur trailhead. You can also drive via Ilam to Dobhan, but it’s a wearyingly long journey on an unreliable road.