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Malalcahuello-Nalcas is a protected area comprising two adjoining national reserves: Malalcahuello and Nalcas. It is located in the Andes, in the Araucanía Region of Chile and bordering the Bío-Bío Region.
The combined Reserva Nacional Malalcahuello-Nalcas covers 313 km2, with the boundary between the Reserva Nacional Nalcas (to the north) and the Reserva Nacional Malalcahuello (to the south) crossing the summit of Lonquimay.
A number of trekking paths can be followed, including a route encircling Lonquimay. Many of these start from the administrative centre of the reserve, operated by CONAF, at the village of Malalcahuello.
- Clem Lindenmayer, Nick Tapp (2003). Trekking in the Patagonian Andes (3rd ed.). Lonely Planet. pp. 86–89.CS1 maint: uses authors parameter (link)