The Lonquén River is in the

Ñuble Region The Ñuble Region ( es, Región de Ñuble), officially the Region of Ñuble ( es, Región de Ñuble), is — since 5 September 2018 – one of Chile's sixteen regions. It spans an area of , making it the smallest region in Chile in terms of area ...

in the southern part of Central Chile. It forms at the confluence of the ''esteros'' Pichimávida and Colomávida that originate in the mountains in the east of the province. Its course lies from north to south, receiving from the west the flow of the ''esteros'' of La Huerta, Coipuencillo, El Salto, Coroney, and Ninhue, and from the east tributaries, ''estero'' Torrecilla, and other lesser tributaries like the ''estero'' Tiuque. The Lonquén then changes direction moving from east to west. In this section, it receives from the north the tributaries of the ''esteros'' Ranquil, Cholchol, Reloca, San Jose, and Santa Rosa, and from the south the ''estero''s Corontas, Buenos Aires, Luengos, Cabrería, Molino, and Antequereo. It then empties into the

Itata River The Itata River flows in the Ñuble Region, southern Chile. Until the Conquest of Chile, the Itata was the natural limit between the Mapuche, located to the south, and Picunche, to the north. See also * Itata *List of rivers in Chile This list ...

from its northern bank as the Itata is turning toward the west. Fort Lonquén was built in 1602 by the Governor

Alonso de Ribera Alonso de Ribera y Zambrano (; 1560 – March 9, 1617) was a Spanish soldier and twice Spanish royal governor of Chile (1601–1605 and 1612–1617). Early life Born in Úbeda, he was the illegitimate son of Hidalgo and Captain Jorge de Ribera Za ...

on the south bank of the Lonquén River 9 km above its confluence with the Itata River.

References

Francisco Solano Asta Buruaga y Cienfuegos Francisco Solano Asta-Buruaga y Cienfuegos (July 21, 1817 – June 13, 1892) was a Chilean politician A politician is a person active in party politics, or a person holding or seeking an elected office in government. Politicians propose, ...

,
Diccionario geográfico de la República de Chile, SEGUNDA EDICIÓN CORREGIDA Y AUMENTADA, NUEVA YORK, D. APPLETON Y COMPAÑÍA. 1899. pg.385 Lonquén (Rio de)

5.1.4. Hidrografía Rio Lonquén
Rivers of Chile Rivers of Ñuble Region {{Chile-river-stub