[3] The Rassokha is formed by the confluence of the rivers Ilin-Yuryakh and Arga-Yuryakh in the Kolyma Lowland.

Finally it joins the left bank of the Alazeya 383 km (238 mi) from its mouth.

[4] The river freezes in late September through early October and stays icebound until the end of May.

The forest tundra of the Rassokha basin, together with the Kondakov Plateau and the Suor Uyata and the Ulakhan-Tas, is part of the migration corridor of the Sundrun reindeer population.

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