The Progo River (Javanese: Kali Praga, ꦏꦭꦶꦥꦿꦒ, Javanese pronunciation: ['kali 'prɔgɔ]) is a river in southern central Java, Indonesia.[1] The river passes through two provinces; Central Java and Yogyakarta Special Region. The source of the river is on the slopes of Mount Sindoro, Central Java.