Kyzylkol, Protected salt lake in Sozak District, Kazakhstan.

Kyzylkol is a brackish lake in Sozak District, Turkestan Region, lying at 331 m in a round basin north of the Karatau Mountains. It measures 16.2 km², is 6.1 km long and 2.8 km wide, with a 10 m maximum depth. Its western and southern shores are steep loess cliffs, while the north and east are flat, bordered by takir and salt marsh.

Kyzylkol lies in Sozak District, Turkestan Region, 7 km west of Kumkent and 20 km east of Sholakkorgan. Its shores hold winter settlements (qystau), and the lake's basin serves as hay meadow and livestock pasture. The Ushbas river, flowing from the Karatau, feeds the lake from the southeast in spring.

The lake's name means "red lake" in Kazakh. Its shores are used as hay meadows and pasture, and winter settlements stand along the banks. The water is considered to have healing properties, and holiday homes are located north of Kyzylkol.

The location is remote, so visitors should arrange transportation from nearby cities well in advance. Bring plenty of water, suitable clothing for changing weather, and binoculars if you plan to observe the bird species that visit the area.

Kyzylkol is a 4,160-hectare Important Bird Area where tens of thousands of birds may rest at once; the Ushbas river reaches its southeastern shore only in spring, and in summer the dry riverbed no longer connects to the lake.