The combined river flows through the Chatra Gorge in a southerly direction to emerge from the hills.

[1] The river freezes in winter and in summer outburst floods in the Barun valley are inevitable but lose much of their power and sediment passing through two broad flat areas.

Studies have shown that the area had been initially habituated by Yakkha and Limbu .

There is one small tea house at Langmale (near the Base Camp) run by a third-generation native of the upper Barun Valley.

In an effort to control and consolidate the impacts of camping, the pitching of tents is only allowed in designated campsites.