Kyzyltuz (Kazakh: Қызылтұз Russian: Кызылтуз) is a salt lake group in Zhelezin District, Pavlodar Region, Kazakhstan.

[1] The lakes lie 6 kilometers (3.7 mi) to the northwest of Krasnovka village, in the area of the Kazakhstan-Russia border, and 90 kilometers (56 mi) to the ENE of Zhelezinka, the district capital.

The Sheldauk hot springs are located 1 kilometer (0.62 mi) to the south of the southern shore.

[3][2][1] The shores of the main lake are flat, with a few irregular-shaped islands in the central area and a deeply indented northern shoreline with a southward projecting headland.

The waters of the lake cluster are too strongly saline for fish, but Artemia salina thrive in the summer.