It was a last-minute decision that brought me to Villa Cerro Castillo, the small village next to the national reserve. Just 90km south of Coyhaique - the capital of the Aysén Region of Chile - sits the under-deserved national park said to be the ‘New Torres del Pa ine’.
Buses leave Coyhaique regularly. Alternatively, you can take the bus towards Puerto Rio Tranquilo and get off at Villa Cerro Castillo. To return to Coyhaique, you can board the bus that comes from Puerto Rio Tranquilo which stops at Villa Cerro Castillo every afternoon. There are also shared taxis/minivans that leave at 5am in the morning - which my hostel owner kindly arranged for me.