Perlovska

Perlovska river () is a river in the Sofia Valley in western Bulgaria. The river is 31 km long. It takes its source from the foothills of Vitosha mountain range, runs through the capital Sofia's South Park, separates the two lanes of Evlogi Georgiev Boulevard, runs through the neighbourhood Poduyane, and finally flows into the river Iskar.

== Geography == Perlovska springs from the villa zone of Dragalevtsi just south of the capital at an altitude of 820 m, crosses the Sofia Ring Road, connects the new neighborhoods, parallel to Bulgaria Boulevard, and then crosses the South Park. Under the Bulgaria Boulevard, the river receives its main tributary, the Boyanska reka, and resurfaces at Evlogi and Hristo Georgievi Boulevard. From there the Perlovska becomes a canal. In the city the course of the river is completely corrected, in places underground. It flows to the left into the Iskar at 513 m above sea level, 1.2 km northeast of the Obradovski Monastery.