Arun River (Lower)

River Facts

Difficulty in Nov: Class 4-
From: Tumlingtar (Alt.280m)
To: Chatara (Alt.105m)
Distance: 77Km (78 miles)
River days: 3
From Kathmandu: 1 hour fly in
Avg. gradient: 2.5 m/km (12 ft a mile)
Volume in Nov: 215cms (7500cfs)
Best season: Nov-April


A powerful and famous river. Little travelled, it offers a shorter and easier alternative to the Sun koshi, with big rapids of moderate difficulty but the necessity of flying in to Tumlingtar makes it relatively expensive for such a short trip.

The River

The Arun is respect as on of the most mighty and powerful rivers of Nepal .The lower valley is in parts quite well populated with a wide variety of different tribes. The whole area is relatively unspoilt , and sees only a few trekking groups, mainly taking the Eastern approach to Everest.


Only a few company schedule rafting trips on the lower half of the Arun and it only sees a few trips each year. However, the rafters who have done it and talks to us, recommend it as the ideal trip for someone who wants to run a big white water river but hasn’t got the time to raft the Sun koshi or the Karnali. They say that the river is , in all ways, better than the trusuli and should perhaps best be compared with bottom half of the Sun koshi-excellent big rapids, fine beaches for camping , a beautiful unspoilt valley, picturesque villages and a wooded gorge- the ‘jungle corridor’ with its associated wildlife.

Tumlingtar is the obvious and most convenient starting point and everyone recommends that you fly into here as it is only a short direct flight from Kathmandu and only forty minutes walk from the river. The 70 km down to chatra has been kayaked in a day, but normally makes a relaxed 3 day raft trip and you can then fly back to Kathmandu from Biratnagar if you wish.

River Map

Please click on map to have larger view.

Arun River (Lower) Rafting Map