Kobilja () is a river in Central Bosnia, between Skender Vakuf and Imljani. It is a right bank tributary of the Ugar River.
It rises at southeast the slopes of Jeà ¾ica â Srebrenik masiff, flowing southeast at around above sea level. The river drains the central part of the northern slopes of the Dinaric mountain massif, with a length of .
Kobilja occurs from several sources-bald head, of which the most is Srebrenik (1,010 m), which rises on the south-eastern slopes samenamed elevation (Srebrenik, 1,131 m), from the massive mountain languages (1,276 m). Band around the top of the extremely rich strong sources of drinking water, of which begin streams basins of Ugar and Vrbanja rivers. From the DjevojaÃÂka ravan (Girls' Plane, above DuniÃÂi rocks and DemiÃÂka river) to Vakufske Njive (Vaqf Fields) there are over 50 streams. Srebrenik is known locally and tanzitno resting place.
Among the many smaller tributaries, the most important right stream is Vukovica, and left are: Straà ¡ivi potok, and Zlovarski potok (streams).
Watershed of the two basins extends along local roads Skender Vakuf - Turbe - Travnik (via Ilomska, KoriÃÂani and Vitovlje). All Ugar's streams flow into Kobilja, and Vrbanja's in DemiÃÂka, GraboviÃÂka river, and Duboka.
Whole flow of Kobilja is in the municipality of Skender Vakuf. During 1960th, at Kobilji and its tributaries, there were 20 mills.