Vergara River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 located in the Intermediate Depression of Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

. The river rises at the junction of the Malleco

Malleco River

Malleco River is a river in Malleco Province, Araucanía Region, southern Chile. It rises in the western slopes of the Andes, within the Tolhuaca National Park and near Tolhuaca Volcano. The river is a major tributary to the Bío-Bío River. The Malleco Viaduct built in 1890 is the main landmark of...

 and Rehue rivers, close to the city of Angol

Angol

Angol is a commune and capital city of the Malleco Province in the Araucanía Region of southern Chile. It is located at the foot of the Nahuelbuta Range and next to the Vergara River, that permitted communications by small boats to the Bío-Bío River and Concepción. This strategic position explains...

.Nahuelbuta Range

Nahuelbuta Range

The Nahuelbuta Range or Cordillera de Nahuelbuta is a mountain range in Bio-Bio and Araucania Region, southern Chile. It is located along the Pacific coast and forms part of the larger Chilean Coast Range...

 barrier forces the river to flow northward. At the latitude of the town of Renaico, the Vergara is joined by its main affluent, the Renaico

Renaico River

Renaico River is a Chilean river that, along all its length, straddles the border between the regions of Biobío and Araucanía.Renaico River rises from the northwest flank of Cordillera de Pemehue, a western spur of the Andes Mountains, north of Tolhuaca volcano. In its upper course, the river...

. From its confluence with the latter river to its confluence with the Liñeco Creek, the Vergara River marks the boundary between the regions of Biobío and Araucanía

Araucanía Region

The IX Araucanía Region is one of Chile's 15 first order administrative divisions and comprises two provinces: Malleco in the north and Cautín in the south....

.

The town of Nacimiento

Nacimiento, Chile

Nacimiento is a Chilean city situated in the Biobío Province, Biobío Region, south of Santiago, and from the closest major city in the region, Concepción....

 lies near the confluence with the Bío-Bío River

Bío-Bío River

The Biobío River is the second largest river in Chile. It originates from Icalma and Galletué lakes in the Andes and flows 380 km to the Gulf of Arauco on the Pacific Ocean....

.