The Trgoviški Timok (Cyrillic: Трговишки Тимок; "Timok of Trgovište") is a river in Serbia, also known as Korenatac (Cyrillic: Коренатац) or Strma reka (Cyrillic: Стрма река; "steep river"). It starts on the western slopes of the Balkan Mountains (Stara Planina mountains), right under the highest peak of the mountain in Serbia, Midžor, less than a kilometer from the Bulgarian border. The river runs to the east, receiving three smaller streams from the other peaks of Balkan mountain range with colorful names (Babin Zub and Tri Uši; Cyrillic: Бабин Зуб and Три Уши; "Oldwife's Tooth" and "Three Ears"). The river passes through the villages of Balta Berilovac, Vrtovac and Inovo. On this reach it receives the Debelička and Ćuštička rivers from the left and the Golaška and Inovksa rivers from th