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Malleco River, flows into the Vergara River

Malleco River is a river in Malleco Province, La 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 Vergara River, which is a tributary of the Biobío River. The Malleco Viaduct built in 1890 is the main landmark of the river.

Coordinates: 37°44′S 72°42′W / 37.733°S 72.700°W / -37.733; -72.700