[1] The river begins in the eastern flank of the Verkhoyansk Range at an elevation of 1,280 metres (4,200 ft).

It heads roughly northeast with the Kular Range to the northwest and then joins river Yana from the left 532 kilometres (331 mi) from its mouth.

[2] The main tributaries of the Bytantay are Billah and Tenki on the right; and Khobol, Achchygy-Sakkyryr, Ulakhan-Sakkyryr and Kulgaga-Suoh on the left.

The Ulakhan-Sakkyryr joins the Bytantay a short distance to the east of Batagay-Alyta.

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