Salar de Surire

Salar de Surire Natural Monument is a high-altitude salt flat and wetland complex located at approximately 4,200 meters above sea level in the Arica y Parinacota Region of northern Chile, near the Bolivian border. Established in 1983, the monument protects 11,298 hectares of Altiplano salt flat, shallow lagoons, geothermal springs, and surrounding puna grassland. The name 'Surire' derives from the Aymara word 'suri,' referring to the Darwin's rhea (a large flightless bird) that inhabits the area. The monument is celebrated internationally as one of the few places on Earth where all three species of South American flamingos — Andean, Chilean, and James's — congregate simultaneously. It forms part of the broader Lauca Biosphere Reserve, one of Chile's most important high-Andean protected area complexes. CONAF administers the monument, which attracts naturalists, birdwatchers, and adventure travelers.

Salar de Surire is one of Chile's premier wildlife destinations on the Altiplano. The monument's three flamingo species — the Andean flamingo (Phoenicoparrus andinus), the James's flamingo (Phoenicoparrus jamesi), and the Chilean flamingo (Phoenicopterus chilensis) — all breed and forage in the salt flat's shallow alkaline lagoons, with populations most abundant from December through April. Darwin's rhea (Rhea pennata), locally called 'suri,' roams the surrounding puna grasslands in family groups. The Andean avocet (Recurvirostra andina) wades in the shallower margins, while crested ducks (Lophonetta specularioides) and Puna teals (Spatula puna) are year-round residents. Vicuñas (Vicugna vicugna) graze on the high-altitude grasses in large herds, and culpeo foxes (Lycalopex culpaeus) are frequently spotted at dawn and dusk. Andean condors (Vultur gryphus) soar overhead, and the endangered giant coot (Fulica gigantea) builds its enormous floating nests in the lagoon margins.

The vegetation of Salar de Surire is adapted to the extreme conditions of the Altiplano: intense UV radiation, large daily temperature swings, frost on most nights, and the saline, waterlogged soils surrounding the salt flat. Hard cushion plants (llareta, Azorella compacta) form dense, rock-like mounds that insulate themselves against the cold and retain heat, growing just a few centimeters per decade. Totora reed (Schoenoplectus californicus and related species) fringes the freshwater inflows to the lagoon, providing nesting cover for waterfowl. Ichu grass (Stipa ichu) and other high-altitude bunchgrasses form the dominant cover across the puna grassland surrounding the salar, providing critical grazing for vicuñas and rheas. Halophytic plant communities tolerant of salt and boron enrichment colonize the salt flat margins. Sparse yareta cushions and low Parastrephia shrubs dot drier upland areas, representing the sparse but resilient flora of one of South America's harshest environments.

The Salar de Surire occupies an Andean Altiplano basin at 4,200 meters elevation, formed by tectonic subsidence and enclosed drainage. Over geological time, evaporation of mineral-rich waters flowing from surrounding volcanic peaks has concentrated salts, boron compounds, and other minerals into the thick evaporite deposits that characterize the salt flat. The surrounding landscape is dominated by Quaternary volcanic rocks — lava flows, ash deposits, and ignimbrites — from nearby Andean stratovolcanoes that continue to be geothermally active. Geothermal manifestations within the monument include hot springs (termas) that maintain water temperatures warm enough for bathing even in the harsh Altiplano climate, created by volcanic heat rising through fractured rock. The boron-rich brines of Surire have attracted commercial interest for borax extraction, which continues to this day under regulated conditions near the monument's borders. The dramatic landscape of white salt flats contrasting with dark volcanic peaks and the blue Andean sky creates one of the most visually striking geological settings in South America.

The climate of Salar de Surire is characterized by the extremes typical of the Atacama-Altiplano high plateau. Daytime temperatures range from around 0°C to 10°C year-round, while nights are bitterly cold, frequently dropping to -15°C or below. The monument experiences a distinct wet season from December through March — the 'Bolivian winter' — when moisture drawn in from the Amazon Basin brings afternoon thunderstorms and snowfall, replenishing the lagoon levels and sustaining flamingo breeding. The dry season from May through October brings clear skies and intense solar radiation amplified by the high altitude, with virtually no precipitation. Winds on the open salt flat can be fierce and cold at any time of year. Visitors should be prepared for rapid weather changes, the effects of altitude sickness at over 4,000 meters, and intense sun exposure. The best time to observe flamingos is December through April when breeding activity peaks.

The Altiplano surrounding Salar de Surire has been inhabited by Aymara people for thousands of years. Archaeological evidence from the broader region, including rock art, ancient campsites, and llama-herding routes, reflects continuous habitation adapted to the harsh conditions of the high plateau. The salar and surrounding puna grasslands formed part of traditional Aymara and pre-Aymara trading and transhumance routes connecting the coast, valleys, and Bolivian highlands. Salt extraction from the salar was a valuable commodity in pre-Columbian economies. Spanish colonizers incorporated the Altiplano into the Viceroyalty of Peru, and the indigenous population was subjected to mita labor obligations in nearby silver mines. The 19th-century War of the Pacific (1879–1884) transferred this territory from Bolivia/Peru to Chile, and Aymara communities in the region maintain cultural connections across the modern international boundary.

Salar de Surire was designated a Natural Monument in 1983 by the Chilean government, primarily to protect the three flamingo species that breed there and the exceptional Altiplano ecosystem. The monument was incorporated into the broader Lauca Biosphere Reserve designated by UNESCO, recognizing its international significance as part of one of the world's highest and most distinctive biomes. CONAF established a ranger station and basic visitor infrastructure to facilitate access while monitoring wildlife and enforcing conservation regulations. One of the ongoing management challenges has been balancing conservation objectives with the borax mining operations that have historically occurred near the salar — a process requiring regulatory coordination between CONAF and Chile's mining authorities. Over the decades since designation, flamingo population monitoring has been conducted in coordination with international flamingo conservation programs, and the monument has been recognized as a key site under the Western Hemisphere Shorebird Reserve Network.

The primary attraction of Salar de Surire is observing the three flamingo species at close range in their natural breeding habitat — an experience that is virtually unique on the continent. Visitors typically drive or hike along the salt flat margins to reach viewpoints where flamingo flocks are feeding and displaying. The geothermal hot springs within or adjacent to the monument are a popular stop, offering a surreal opportunity to soak in warm waters surrounded by salt flat and volcanoes at over 4,000 meters altitude. Wildlife watching for vicuñas, Darwin's rheas, Andean condors, and an array of Altiplano waterbirds rounds out the natural history experience. The dramatic landscape photography opportunities — flamingos against the white salt crust, snow-capped volcanic cones reflecting in lagoon water — draw nature photographers from around the world. The monument is commonly visited as part of a circuit that includes the adjacent Parque Nacional Lauca to the east.

Salar de Surire is located in a remote part of the Arica y Parinacota Region, accessible primarily via an unpaved road heading south from Putre (the nearest service town) or via the Lauca National Park circuit. A four-wheel-drive vehicle is essential, as roads are rough and conditions can deteriorate quickly with rain or snow. The nearest major city is Arica, approximately 200 km to the northwest via paved and then gravel road. CONAF maintains a ranger station at the monument where visitors can register and obtain information. There are no hotels or permanent accommodation within the monument; camping at designated sites is possible but requires full self-sufficiency with food, fuel, and cold-weather gear. The town of Putre (3,500 m elevation) offers basic accommodation and services and serves as a staging point for acclimatization before visiting the higher salar. Altitude sickness is a serious concern; visitors are advised to spend at least two nights in Putre before ascending to the 4,200-meter monument.

Conservation of Salar de Surire focuses on protecting the three flamingo species — all of which face threats from habitat loss, water extraction, and climate variability across their Altiplano range. The Andean flamingo (Phoenicoparrus andinus) and James's flamingo (Phoenicoparrus jamesi) are classified as Vulnerable on the IUCN Red List, making breeding sites like Surire critically important for their survival. CONAF rangers conduct regular monitoring of flamingo nesting colonies and coordinate with international flamingo conservation programs to track population trends across the entire Andean breeding network. Borax extraction near the monument boundary poses an ongoing management challenge, as industrial activity can disturb wildlife and alter hydrology. Water management is a key concern: any reduction in freshwater inflows from surrounding mountains — whether from climate change or extraction — directly threatens the lagoon ecosystem on which flamingos depend. The monument's inclusion in the Lauca Biosphere Reserve provides an additional framework for coordinating conservation across the broader high-Andean landscape.