Ayagoz River

Ayaguz River, also spelled Ayoguz, is a river in Kazakhstan. The city of Ayagoz in Eastern Kazakhstan is located on its bank. There no longer much if any flow from the river into Lake Balkash.

In 1717, Kaip Khan and Abul Khayr attacked the Dzungar khanate but were defeated on the River Ayaguz.

Various Russian explorations took place in the area in the first half of the 19th century. Federoff explored the area in 1834. Between 1837 and 1843 the trans-Irtysh steppe as far as the Ayaguz River and Chu River was mapped on a scale of five versts to the inch. The shores of Lake Balkash were also surveyed and explored. Prince Gortchakoff, governor of Western Siberia, sent an officer named Assanoff in 1839 with some men to Lake Balkash to see if a fishing station could be established. He left Ayaguz and descended the Ayaguz River taking soundings, and fishing. He found two types of fish: marena and sudak (not in large numbers) in the brackish water. The Kuzu Kerbetch tomb was found nearby and was said to be significant to the Kyrgyz population. Kuzu-Kerpetch was a Krygyz chief known from folk songs for valor and his love for Baian Sulu (who eventually caused his death)

The rivers reedy lower section were once tiger habitat. The river turned up an Ordovician trilobite fossil, an Agerina acutilimbata (see list of trilobite genera, found by Ghobadi Pour et al. in 2011 in Katian, Karagech Formation on the east side of the Ayaguz River 7 kilometres (4 mi) north of Akchii village in the Tarbagatai Range.

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