Los Arrayanes National Park: A Jewel of Patagonia

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Los Arrayanes National Park: A Jewel of Patagonia

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Los Arrayanes National Park, located in southern Neuquén Province, Argentina, is a pristine protected area renowned for its enchanting myrtle forest. Occupying the Quetrihué Peninsula, this unique park was established to preserve one of the region's rarest and most beautiful ecosystems.

Exploring Los Arrayanes National Park: The Enchanted Forest of Patagonia

Los Arrayanes National Park, located in the southern part of Neuquén Province, Argentina, is a pristine protected area renowned for its enchanting myrtle forest. This unique park was established to preserve one of the region's rarest and most beautiful ecosystems, offering visitors a chance to immerse themselves in the natural splendor of the Patagonian Andes. The park's breathtaking landscapes, diverse flora and fauna, and rich cultural heritage make it an exceptional destination for nature lovers and adventure seekers.

The Creation and Significance of the Park

Los Arrayanes National Park occupies the entirety of the Quetrihué Peninsula, which extends southward into Lake Nahuel Huapi. Covering 1,753 hectares (4,332 acres), the park's namesake myrtle forest spans only about 20 hectares (50 acres). Originally part of the larger Nahuel Huapi National Park, the Quetrihué Peninsula was designated as a separate protected area to ensure focused conservation efforts. These parks form a unified conservation and management unit, administrated from San Carlos de Bariloche, and are part of the Andino Norpatagónica Biosphere Reserve.

The Arrayan Forest

The Arrayan Tree: A Botanical Marvel

The Arrayan tree (Luma apiculata), also known as quetri, cuthu, or the red tree, is a standout species within the park. Belonging to the Myrtaceae family, these trees are iconic in the Patagonian Andes region. The Arrayan tree is notable for its cinnamon or brick-red bark, which is smooth and cold due to the high tannin concentration. When the bark peels, it reveals characteristic whitish spots.

Growth and Characteristics

Arrayan trees grow slowly, typically reaching heights of 8 to 15 meters (26 to 49 feet), although some specimens can grow up to 25 meters (82 feet) and live for as long as 650 years. Their trunks are twisted and branched, with diameters ranging from 28 to 68 centimeters (11 to 27 inches). These evergreen trees thrive in humid environments along rivers and lakes, forming dense, impenetrable forests with thick canopies that cast deep shadows.

Floral and Fruiting Periods

The Arrayan's foliage remains vibrant throughout the year, with dark green leaves on the upper side and lighter green underneath. During summer, the trees bloom with small, white, hermaphroditic flowers that emit a pleasant fragrance. By the end of summer, the trees produce fleshy, black-purple berries, which are edible and have medicinal properties for soothing and healing wounds. Unique among local flora, the Arrayan tree continues to bloom from January until the end of March, long after other species have ceased flowering.

The Broader Ecosystem

Beyond the myrtle forest, the Quetrihué Peninsula boasts diverse flora, including the maitén, southern beeches such as coihue and ñire, colorful shrubs like notro and chilco, and dense bamboo thickets of colihue. These species contribute to the park's rich biodiversity and complex ecological interactions.

The Andean Forest

The surrounding forest is characterized by a variety of tree species that thrive in the cool, moist climate of the Patagonian Andes. Southern beeches, including coihue and ñire, dominate the landscape, creating a lush, green canopy that supports a wide range of wildlife. These trees, along with the vibrant shrubs and bamboo, provide essential habitats and food sources for numerous species.

Cultural and Recreational Importance

Los Arrayanes National Park is a natural wonder and a cultural and recreational haven. The park's proximity to San Carlos de Bariloche makes it an accessible destination for nature lovers, hikers, and wildlife enthusiasts. Visitors can explore well-maintained trails that wind through the myrtle forest and offer breathtaking views of Lake Nahuel Huapi.

Conservation Efforts

The park's establishment as a separate protected area underscores Argentina's commitment to preserving its natural heritage. Ongoing conservation efforts aim to protect the unique ecosystems of the Quetrihué Peninsula, ensuring that future generations can enjoy and study this remarkable landscape.


Los Arrayanes National Park is a captivating destination that highlights the natural beauty and ecological significance of the Patagonian Andes. Its unique myrtle forest, diverse flora, and accessible location make it a valuable part of Argentina's national park system. Through continued conservation efforts, the park remains a testament to the importance of preserving our planet's natural treasures.

Arrayan: Luma apiculata, flowers and bark

Flowers and bark of the Arrayan (Luma apiculata)