🇦🇷 Argentina · Cuyo
The Reserva Natural Laguna de Llancanelo is a vast salt wetland on the steppe of the Malargüe department, in the south of Mendoza province. It is one of the most important wetlands in Argentina for water birds, a refuge for extraordinary birdlife (more than 150 recorded species), especially the thousands of flamingos that turn the water pink in a landscape of great beauty and silence.
Protected as a provincial reserve and recognized internationally as a Ramsar site for its importance to migratory birds, the Laguna de Llancanelo is a paradise for birdwatchers, photographers and nature lovers. Its setting of steppe, water and mountains, with the cordillera and the volcanoes of southern Mendoza behind, offers memorable sunrises and sunsets.
This guide covers the Laguna de Llancanelo from a practical angle: watching flamingos and other birds, the value of the wetland as a Ramsar site, how to visit it from Malargüe (the usual base), how it combines with La Payunia and the Caverna de las Brujas, and the useful details for getting there, touring and enjoying one of the country's great bird sanctuaries.
The Laguna de Llancanelo is an ancient salt wetland in the endorheic basin of southern Mendoza, historically a refuge for wildlife and the territory of the region's indigenous peoples. It was protected as a provincial reserve in 1980 (decree 09/80) and declared a Ramsar site of international importance on 8 November 1995; in 2007 provincial Law 7.824 expanded the protected area to some 88.000 hectares. Its name has indigenous roots and its fame comes from the flamingo colonies and its exceptional birdlife.
Read the full history ↓The land of sun and good wine: a Huarpe oasis at the foot of Aconcagua, cradle of San Martín's Army of the Andes, rebuilt after the 1861 earthquake and turned into the world capital of Malbec and the high mountains.
Read the history of Mendoza →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
There is a moment, just as the sun breaks over the steppe of southern Mendoza, when the Laguna de Llancanelo seems to catch fire: thousands of flamingos spread their wings at once and the water, until then grey and still, turns an intense pink that lasts only a few minutes. Anyone who gets there after hours on gravel roads, in the middle of one of the driest and emptiest regions of Argentina, cannot help wondering how so much life can gather in a place that looks so hostile.
The answer lies underground and in the geological history of southern Mendoza. The Laguna de Llancanelo is a salt wetland of very ancient origin, formed in an endorheic basin — that is, with no outlet to the sea — on the steppe of the Malargüe department. Meltwater from the cordillera and from the region's rivers and streams, instead of reaching the ocean, has been gathering here for millennia, creating a shallow, salty sheet of water that over the centuries became a vital point for the wildlife of the arid south of Mendoza.
That abundance of water and food in the middle of the steppe made Llancanelo a natural refuge for an extraordinary number of birds, especially water birds, as well as a significant stop on the routes of the migratory birds that cross the continent, from Tierra del Fuego to the Northern Hemisphere. The lagoon was also part of the territory of the region's indigenous peoples — the Pehuenche and other groups who lived in southern Cuyo — as its name, of indigenous root, reflects, along with the long relationship of local communities with this environment, which they used as a source of game, salt and resources in a land where resources were scarce.
For a long time, Llancanelo was a remote spot in the vast, thinly settled Malargüe region, known to rural dwellers, puesteros and drovers who crossed the area with their animals, and known for its wildlife, but far from tourist circuits and almost unheard of outside Mendoza. Its ecological value, however, would end up bringing it recognition beyond provincial and national borders, and today it makes the lagoon an obligatory stop on any trip through southern Mendoza.
Recognition of the extraordinary ecological value of the Laguna de Llancanelo led to its legal protection: on 7 February 1980, through provincial decree 09/80, the Reserva Natural de Fauna Laguna de Llancanelo was created, with an initial area of some 45.000 hectares, with the aim of conserving the wetland, its biodiversity and, above all, the enormous bird population that depends on it. In 2007, provincial Law 7.824 expanded the protected area to some 88.000 hectares, even adding volumetric limits — 600 meters up and 600 meters down — to shield the subsoil and the airspace of the wetland. The lagoon holds large flamingo colonies and dozens of other water bird species, resident and migratory, which makes it one of the most important sites in the country for birdlife, comparable to other great South American wetlands.
That value was also recognized internationally: on 8 November 1995, Llancanelo was declared Ramsar site No. 759, that is, a wetland of international importance under the Ramsar Convention, an intergovernmental treaty signed in 1971 in the Iranian city of Ramsar and dedicated to the conservation and wise use of the world's wetlands. The designation covers the lagoon and a surrounding area of some 65.000 hectares, highlights its role as a habitat for water birds and as a key link in migratory routes, and commits the provincial and national state to its protection and responsible management, with regular reports on the site's state of conservation.
Being a protected area and a Ramsar site means the visit must be made carefully and respectfully, keeping to the permitted areas and to the quiet of the wildlife. That is why entering the reserve requires requesting the ticket in advance through the province's official system and being accompanied by a licensed guide: it is not bureaucratic whimsy, but a way of limiting human impact on a fragile ecosystem, where a disturbance during nesting season can make hundreds of flamingos abandon their nests. That protection seeks to ensure that Llancanelo goes on being, in the future, the great bird sanctuary it has been for millennia, rather than a postcard degraded by tourist overload.
In recent decades, along with the growth of Malargüe as a destination for nature, adventure and science tourism — with landmarks such as the planetarium and observatory, the Caverna de las Brujas and its closeness to Las Leñas — the Laguna de Llancanelo joined the great attractions of southern Mendoza. Its spectacular birdlife — especially the flamingos that turn the water pink — its landscapes of steppe, water and mountains, and the magic of its sunrises and sunsets have made it a destination prized by birdwatchers, professional and amateur photographers, and nature lovers who come from across the country and abroad.
The visit, generally organized from Malargüe and accompanied by guides who know the best sectors and moments for watching, is made with respect for the protected status of the wetland. Operators such as Ikatu Viajes, Aymara Viajes or Lauke/Mendoza Tours run full-day tours combining the Laguna de Cari Lauquen, the climb up the Trapal volcano and the shore of Llancanelo, leaving from and returning to the town. Llancanelo is usually combined with the region's other great trips — the volcanic reserve of La Payunia, with its more than eight hundred volcanic cones, and the Caverna de las Brujas, a system of limestone caves with stalactite and stalagmite formations — making up a diverse nature circuit of enormous value in one of the most spectacular and rugged areas of the country.
So the old salt lagoon of the steppe, a refuge for birds and for indigenous peoples over thousands of years, is today both a conservation site of global relevance and a destination that lets the visitor glimpse the natural wealth of southern Mendoza, a reminder of how important it is to protect wetlands as reservoirs of life on a planet increasingly affected by climate change and the loss of natural environments.
The Laguna de Llancanelo is, above all, a bird sanctuary. More than 150 species have been recorded, but its emblem is the flamingo, which arrives in thousands to feed and nest on the islands and shallows of the lagoon. Three South American flamingo species can be seen in the region: the Chilean or common (Phoenicopterus chilensis), the Andean and James's, the last of these one of the rarest flamingos in the world. Their breeding colonies make Llancanelo one of the most important flamingo breeding sites in the southern cone, a phenomenon that depends entirely on the level and the salinity of the water: if the lagoon dries out or its chemical make-up changes, the nesting colonies can disappear from one year to the next.
The geological setting of the lagoon is that of the volcanism of southern Mendoza, neighbor to the great field of La Payunia, one of the largest and best preserved volcanic fields in the world. Cones such as the Trapal and other volcanic landforms rise around the basin, and the endorheic depression that holds the lagoon is itself linked to the tectonic and volcanic dynamics of the region, shaped by millions of years of eruptions, lava flows and movements of the Earth's crust. Water, salt and fire coexist in a landscape where the arid steppe suddenly opens into an immense mirror full of life, a contrast that surprises any first-time visitor.
The fragility of the wetland also made it the stage of one of the most famous environmental court battles in Argentina. In 2000, the oil company Repsol YPF put forward a project to extract crude in the basin area, within the reserve's zone of influence, and in January 2003 the Mendoza government approved the environmental impact statement authorizing it (resolution 190/2003). The NGO Oikos Red Ambiental, led by Eduardo Sosa, filed a class action against that authorization, and on 14 March 2005 the Supreme Court of Justice of Mendoza handed down an unprecedented ruling: it declared the authorization unconstitutional and upheld the ban on hydrocarbon extraction in the reserve until new studies were carried out and the protected area was mapped out. That ruling — hailed by the national press as a landmark in Argentine environmental law — also drove the expansion of the reserve through Law 7.824 of 2007. The recent history of Llancanelo is, in large part, the story of the fight to preserve a delicate balance: that of a wetland vital to birds in a region rich in energy resources and with an increasingly variable climate, where dry years shrink the sheet of water drastically. Conserving it is a permanent challenge involving the provincial state, the local communities of Malargüe and those who visit, each with a share of the responsibility so that coming generations can still see the same spectacle of thousands of flamingos taking flight at dawn over the Mendoza steppe.