The Bolshoye Toko (Russian: Большое Токо) is a lake in Sakha, Russia.

[1] The lake is located in the Aldan Highlands, on the border of Sakha Republic and Khabarovsk Krai.

River Utuk flows into the lake from the Toko-Stanovik subrange of the Stanovoy Highlands.

It is the deepest lake in Yakutia.

[2] This Sakha Republic location article is a stub.