The Baikonyr or Baikonur (Kazakh: Байқоңыр; Russian: Байконыр) is a river in the Ulytau District, Karaganda Region, Kazakhstan.

[2] Ancient petroglyphs have been found on rocks along both banks of river Baikonyr.

It heads roughly southwestwards within a valley having a maximum width of 2 km (1.2 mi) to the northeast of the Kalmakkyrgan.

In its final stretch it flows roughly westwards, bending northwestwards to end up in the southeastern end of the Shubarteniz lake, to the south of the mouth of the Zhymyky.

But it turns salty as the flow diminishes and in the summer it dries largely up, breaking up into small pools.