The Ponor (Russian: Понорь), also known as Ponar (Понaрь) is a river in Moscow Oblast, Russia.

[1] The source is 1 km south from the village of Krupino, Moscow oblast.

Ponor runs into Nerskaya on distance of 5 km on the northeast from the town of Kurovskoye.

The country, which the Ponor runs through, is very boggy and, therefore, difficult for hiking.

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