Koshtan-Tau (Russian: Коштан-тау; Karachay-Balkar: Къоштан-тау, means paired mountain) is the highest peak (5,144m) of the Koshtan massif of the central Caucasus Mountains in the Kabardino-Balkaria Republic of Russia, near the border with Georgia. The peak was first ascended in 1889 by Herman Woolley and party.

• A. F. Mummery, H. W. Holder, W. F. Donkin and C. T. Dent, "Further Explorations in the Caucasus", Proceedings of the Royal Geographical Society and Monthly Record of Geography, New Monthly Series, Vol. 11, No. 6 (Jun., 1889), pp. 351–374

• Columbia Encyclopedia entry