The Kotuykan has its source in the highest part of the
Anabar Plateau. It is a fast-flowing river that flows westwards in a deep valley, often surrounded by picturesque
cliffs of marine sediments exposed by erosion that are 1.5 billion years old. The Kotuykan joins the right bank of the Kotuy as the latter flows from the south across the western side of the Anabar Plateau, from its mouth and from the mouth of the
Khatanga in the
Laptev Sea. Its main
tributaries are the long
Ilya (Илья) and the long Dyogdyo (Дёгдё). ==See also==