The Morkoka (Russian: Моркока; Yakut: Моркуока, Morkuoka) is a river in Sakha Republic, Russia.

It has a length of 841 km (523 mi), and it has a basin size of 32,400 km2 (12,500 sq mi).

[1] The river sources from Lake Bayyttakh and travels through the Vilyuy Plateau.

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