Los Cardones

Los Cardones National Park is located in the Salta Province of northwestern Argentina, protecting 64,117 hectares of arid mountain valleys in the Altos Andes, Puna, and Monte de Sierras y Bolsones ecological zones. ^[1] Established in 1996 by Law 24,737, it is named for the giant cardón cactus (Trichocereus atacamensis) that dominates its landscape. ^[2] The park lies within the Calchaquí Valleys, at elevations ranging from 2,600 to 5,226 meters above sea level. ^[3] Its remote highland setting, spectacular desert scenery, and pre-Columbian cultural heritage make it one of Argentina's most distinctive protected areas.

The park shelters a range of Andean and Puna fauna adapted to high-altitude desert conditions. Andean condors soar above the valleys, while pumas inhabit the rocky terrain. Vicuñas and guanacos (Lama guanicoe) graze the open grasslands, and viscachas—large relatives of chinchillas—perch on rocky outcrops. ^[1] The lesser rhea (suri) strides across open pampas, and several raptor species hunt the valley scrub. Reptiles such as lizards of the genus Liolaemus are common among the rocks. The park is recognized as an Important Bird Area.

The most iconic plant is the cardón cactus (Trichocereus atacamensis), which can grow nearly 15 meters tall and may live for centuries. ^[1] These towering cacti create a surreal forest across the slopes and valley floors. Lower elevations support jarilla shrubs, tola (Parastrephia), and various Andean grasses. At higher elevations, the Puna ecosystem transitions to cushion plants and ichu grasses (Stipa spp.). The Monte sector represents the greatest cactus diversity in Argentina, with several endemic and near-endemic plant species found within the park boundaries. ^[1]

The park's landscape is shaped by intense Andean tectonic activity over millions of years. The terrain features folded and faulted sedimentary layers deposited during the Paleozoic and Mesozoic eras, later uplifted by Andean compression. Deeply eroded valleys expose colorful strata of red, ochre, and purple mudstones and sandstones. The Calchaquí River has carved dramatic ravines through these formations. Volcanic rocks and deposits from Pliocene and Pleistocene eruptions are also present at higher elevations.

Los Cardones experiences a semi-arid to arid Puna climate with strong altitudinal variation. Summer (December–March) brings most of the annual rainfall, typically 200–300 mm concentrated in afternoon thunderstorms—a pattern known locally as the 'Bolivian winter.' Winters are cold and dry, with temperatures frequently dropping below freezing at night. Frost can occur year-round at higher elevations. Daytime temperatures are mild to warm in summer (15–25°C at valley floor), while winter days are cool (5–15°C). Wind is common, especially in the afternoon.

The Calchaquí Valleys have been inhabited for over 10,000 years. The Diaguita people, part of the broader Andean cultural sphere, built extensive agricultural terraces, irrigation canals, and fortified villages called pucarás throughout the area. The park contains numerous pre-Columbian archaeological sites, including the ruins of Potrero de Payogasta. ^[1] Spanish colonial forces subjected the Diaguita after prolonged resistance in the Calchaquí Wars of the 17th century. The region subsequently became part of Spanish colonial trade routes connecting the Andean silver mines.

Los Cardones National Park was created by Argentine National Law 24,737, promulgated on November 20, 1996. ^[1] Its establishment was driven by the need to protect the unique cardón cactus ecosystem and the associated high-altitude Andean landscapes of Salta Province. The park is administered by Argentina's National Parks Administration (Administración de Parques Nacionales, APN). Since its creation, management has focused on preventing illegal cactus harvesting—cardón wood has historically been used for construction—and managing visitor access along Route 33.

The primary access route is Ruta Nacional 33, which crosses the park through the Tin Tin Plain via the Recta del Tin-Tin—a remarkably straight 38-km asphalt road traversing dense cardón forest. ^[1] The Tin Tin Plain itself is the park's signature landscape. Hiking trails lead to elevated viewpoints over the Calchaquí Valleys. The Payogasta sector provides access to archaeological ruins. Birdwatching is excellent along the valley floors, and photography of the towering cacti against Andean peaks is a major draw. The nearby village of Cachi serves as the gateway town.

The park has no entrance fee and limited infrastructure, reflecting its remote character. A ranger station and basic visitor information point are located on Route 33. The nearest services are in Cachi, approximately 17 km from the main park area, offering accommodation, restaurants, and fuel. ^[1] The park is reached by car via Ruta Nacional 68 from Salta city to Cafayate, then Ruta 40 north, or via the spectacular Cuesta del Obispo road. A 4WD vehicle is recommended for secondary roads within the park.

The primary conservation challenge is the illegal extraction of cardón cactus wood, which was historically used for roofing and furniture in the region. ^[1] The APN works with local communities to discourage this practice through patrols and education. Overgrazing by domestic livestock—particularly goats—threatens native vegetation, and the park manages grazing rights with neighboring communities. Climate change is causing shifts in precipitation patterns that affect both the cactus populations and high-altitude water sources. Invasive plant species are monitored along the main road corridor.