Arun valley Trekking lies in Everest Regions which provides really superb views of both Mt Everest and Makalu. It is located between the Sagarmatha and Makalu-Barun National Parks. Trekking in this valley provides an alternative approach to the Khumbu region. Trek Nepal recommend this approach to those people who have already been in the Everest region and want to revisit Everest Base Camp (Kala Pattar) via a less traveled route.
It is really a Non Touristy area but we can see significant views of Mt. Everest, Makalu, and hundreds of other mountains just on your eye. Sherpa, Rai and Limbus are the main inhabitants of this region. Walking north up the Arun river to Sedua and Num, then crossing Barun La(4110m.)into the upper Barun khola valley for a close look at Makalu. You can put together an even wilder trek by crossing Sherpani col and west col into the upper Hongu valley