The Gelendzhik Bay (Russian: Геленджикская бухта) is an ice-free bay located on the Russian coast of the Black Sea, immediately to the southeast of the Tsemes Bay. The entire 12-km coastline between the capes Tonkiy and Tolstyi falls within the boundaries of Gelendzhik. Beaches take up about two thirds of shoreline. Further inland rise the low Markotkh mountains.