The Khastakh or Tuora-Yuryakh (Russian: Хастах; Yakut: Хаастаах, Xaastaax) is a river in the Sakha Republic (Yakutia), Russia.

[2] The river flows south of the Arctic Circle, across desolate tundra territories of the Oymyakonsky District marked by mountainous terrain and permafrost.

It has its sources in the southern slopes of the Khalkan Range (Халканский хребет), a subrange of the Suntar-Khayata, by the border with Okhotsky District of Khabarovsk Krai.

The river flows roughly in a northern direction into a basin of the Yana-Oymyakon Highlands filled with lakes where it meanders and divides into multiple channels.

Finally the river joins the Taryn-Yuryakh flowing from the right to form the head of the Indigirka 1,726 km (1,072 mi) from its mouth.