[2] The Ubort is fed mostly by melting snow (~70%) and peaks during the spring run-off, usually mid-March to early May, and maintains an even, albeit lower, flow during the summer months.

The Ubort originates in the hills above and south of the village of Andreyevichi[3] in Zhytomyr Oblast.

It then flows northeast and north past Lelchytsy, and Moiseyevichi, before entering the Pripyat at Pyetrykaw.

Some maps in the seventeenth and eighteenth centuries mark it as the Олевская (Olevskaya) or in Polish Olewsko, as being of the town of Olevsk.

[7] In July 1941, between 30 and 40 Jews from Olevsk were taken to the Ubort River, where they were humiliated and tortured; some of them were murdered in the pogrom.