|Main source||Baryshivka Raion, Ukraine|
|River mouth||Trubizh River
|Length||46 km (29 mi)|
|Basin size||492 km2 (190 sq mi)|
Alta River (Ukrainian: Альта, Ільтиця, Alta, Iltytsya) is a small river in Ukraine and is a right tributary of the Trubizh River. The ancient town of Pereyaslav (currently Pereiaslav-Khmelnytskyi, Ukraine) is situated between the Trubizh and Alta rivers.
The river is considered the place where the assassins sent by Svyatopolk the Accursed killed saints Boris and Gleb in 1015. In 1019 it was the site of a battle between Svyatopolk and his brother Yaroslav I the Wise which Yaroslav won.
On 25 May 1630 on the river near Pereyaslav was the place where Polish hetman Stanisław Koniecpolski was beaten by the Zaporozhian Cossacks led by Taras Triasylo. The battle is known as the Taras Night and is described in the Taras Shevchenko poem Taras Nich .
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