 The Catatumbo River is a fast flowing river, originating as the confluence of the Peralonso, Sardinata and Zulia Rivers in the central valley of Norte de Santander.The upper part of the river is sourced from the highlands near the Macho Rucio Peak ("gray mule peak"), located in the south of Ocaña province.Its mouth is at Lake Maracaibo in Venezuela, through a delta called La Empalizada ("the fence").