Ilomska ( Иломска) is a river in Bosnia and Herzegovina. It is right tributary of the Ugar. It is about 20 kilometres (12 mi) in length. The river starts in Vlašić's Mountain. It is an essential body of water for surrounding wildlife.
Ilomska flows between the Žežnička Greda (altitude 1,477 metres or 4,846 feet) and Javorak (1,499 m or 4,918 ft) mountains. It has a curved flow around Lisina (1,494 m or 4,902 ft) and Runjavica (1,316 m or 4,318 ft) mountains, through coniferous (fir and spruce) and mixed spuce-beech woods.
Its flow below Petrovo polje[1] has sharp curves.[2][3][4]
After two attractive waterfalls, Ilomska flows into the Ugar, a few kilometers downstream from Vitovlje village. The height of the bigger water flow is around 40 meters. Waterfalls in this wildness attract mountain-climbers, tourists, and fishermen.[5][6][7]