Los Arrayanes National Park is a national park of Argentina with an area of 17.53 square kilometres. It covers the Quetrihué Peninsula on the shore of the Nahuel Huapi Lake in the province of Neuquén, 3 km from Villa la Angostura.
Even though arrayán trees (Luma apiculata) can be seen on the way to the end of the peninsula, the forest of 300 year old arrayanes covers 0.2 km² of the southern point, with individuals of over 600 years. The forest can be reached by boat from different points of the Nahuel Huapi lake, or a 12 km path from the beginning of the park at the port of Villa La Angostura. This path, full of ups and downs, is also popularly done by mountain bike.
The park, which has 1.753 hectares, covers all the Quetrihué Peninsula that is ubicated in the north side of Nahuel Huapi Lake. In the south side of the Quetrihué Peninsula there is the most singular formation: the purest arrayanes forest, white flowers and cinnamon bark trees with irregular whitish spots.
PN Los Arrayanes (Los Arrayanes National Park) preserves a sample of the patagonic forest eco-region, which has wet and cold warm climate, with winter snowfalls and rains. During almost all the year there are frosts and strong winds from the West.
This eco-region has high mountains, with glaciery valleys. “Semideciduos” forest, which is high represented in the north but not too much in the southern part, dominates the area and alternates with “turberas” in the southern part.