アルダン川
It is located in the south of the republic on the right bank of the Lena River near the mouth of the Aldan River and borders with Khangalassky and Amginsky Districts in the north, Ust-Maysky District in the northeast, Khabarovsk Krai in the east, Neryungrinsky District in the south, and with Olyokminsky District in the west and southwest.