The Yasachnaya (Russian: Ясачная; Yakut: Дьаһаак, Cahaak) is a river in the Russian Far East. It rises in the Chersky Range and meets the Kolyma near the settlement of Zyryanka. It is 490 kilometres long, and has a drainage basin of 35,900 square kilometres. Its main tributaries are Omulyovka, Olguya, Rassokha and Gonyucha, all from the West.
