Arun is one of the famous rivers in eastern part of Nepal. Arun river is 300meters, between two High mountains Makalu 8463meters and Kanchanjunga 8586 meters. You will take flight kathmandu to Tumlingtar and trek though to Everest region and you will pass many hill, valley and villages. Also you will pass pach pokhari Lake and you will arrive Mera valley. Mera peak is one of the famous trekking peak in Nepal, you will have best view of Kanchajunga, Makalu, Barunse, Lhotse, Everest, Choyo etc. than you pass though the over Zatre-La to Lukla and from Lukla flight back to Kathmandu.