Nerl (Klyazma)

The Nerl (Нерль) is a river in the Yaroslavl, Ivanovo, and Vladimir Oblasts in Russia, a left tributary of the Klyazma (Volga's basin). The river is 284 km long, and its drainage basin covers 6,780 km2. The Nerl River freezes up in November or December and stays under the ice until April. Its main tributary is the Ukhtoma.