The Kuydusun is a left
tributary of the Indigirka. It has its sources in the northeastern slopes of the
Suntar-Khayata, at the border with
Khabarovsk Krai. The river flows roughly in a northern direction across the mountainous territory, then turns northeastwards into a plain of the
Yana-Oymyakon Highlands filled with lakes where it
meanders and divides into multiple channels. In its final stretch the river turns again northwards. Finally the Kuydusun joins the left bank of the Indigirka from its mouth.
Tributaries The main tributaries of the Kuydusun are the long
Mannyk-Yuryakh on the right, as well as the long
Buor-Yuryakh on the left. The river is frozen between early October and the end of May. There are more than 20,000 lakes in its basin with a total area of , as well as 60
ice fields, with a total area of . ==See also==