Hrčavka

The Hrčavka is a river in the southeastern part of Bosnia and Herzegovina and is located in the municipality of Foča. It is the largest tributary of the Sutjeska. It flows along the Zelengora mountain and the Sutjeska National Park throughout its course.

It rises in a forested area at an altitude of 1,570 m, between the mountain ridges of Zelengora: Planika (1,795 m), Ljubina groba (1,815 m), Orlovača (1,960 m) and Kozje strane (2,014 m). It passes through a narrow canyon, and then flows into the Sutjeska River, at an altitude of 530 meters and a flow length of 13.5 km. The height difference from the source to the mouth is 1,030 meters, or a drop of 76.3 m/km of flow.