The Ay (Bashkir: Әй, Äy; Russian: Ай) is a river in Bashkortostan and Chelyabinsk Oblast in Russia, a left tributary of the Ufa.

[1] The Ay freezes up in late October or early November and remains icebound until mid-April.

[3] This article includes content derived from the Great Soviet Encyclopedia, 1969–1978, which is partially in the public domain.

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