In the area of the "Sutjeska" National Park, a network of watercourses and ponds has been developed, with the Sutjeska River as the main watershed. The Sutjeska River begins its 33-kilometer journey at an altitude of 1,800 m above sea level, on the border of Bosnia and Herzegovina and Montenegro, and ends at the mouth of the Drina at about 430 m.a.s.l. Therefore, the total drop is 1,370 m, which speaks volumes about the character of this noisy mountain beauty. The river Sutjeska flows through the entire area of Tjentište, the central part of the Park. The cold and extremely clean waters of Sutjeska are an ideal habitat for salmonid fish: trout and grayling, so together with their idyllic surroundings they make a paradise for fishing in Spratly. The main tributaries of Sutjeska from the west are Jabučnica, Hrčavka and Bukovik, and from the east Suški potok, Perućica and Ždrijelo. All those waters of the Park are crystal clear and clean, rich brook trout, but also other forms of life characteristic of those ecosystems. The Hrčavka is a left tributary of the Sutjeska and rises on Zelengora, between Ljubina Grob and Planika, at 1,570 meters. The length of this river is 13.5 kilometers and its water, unusually cold, flows through a picturesque canyon, full of cascades and rock pools. It is possible to organize canyoning through part of the Hrčavka canyon, and the Sutjeska canyon is suitable for kayaking.

The gentle mountain river Sutjeska flows through one of the largest canyons in Bosnia and Herzegovina. With its centuries-old activities, it managed to separate two large mountains and cut itself between the mountainous Volujek on the right and Zelengora on the left. The canyon of the river Sutjeska is more than 1500 m deep. A large number of plant species of the Sutjeska canyon are endemic and relict, such as the rock-loving species "Sutjeska bells" (Edraianthus Sutjeskae). The catchment area of the river

Sutjeska has the shape of an almost isosceles triangle, the sides of which extend in the directions southeast-northwest, southwest-northeast.

Itinerary: Tjentište - Vratar - Vidikovci above the Sutjeska canyon