Oleška (river)
The 883rd longest river in the world
The Oleška is a river in the Czech Republic, a left tributary of the Jizera River. It flows through the Liberec and Hradec Králové regions. It is 36.0 km (22.4 mi) long.
Flows through: Czech Republic.
River data from Wikidata (CC0); lengths normalised to a common unit.