Laguna de Tirez

Laguna de Tirez is a salt endorheic lake south of Villacañas, in the province of Toledo, Castilla-La Mancha. It belongs to the Guadiana river basin, specifically the Riánsares sub-basin, though the lagoon itself has no direct link to any watercourse — it fills solely from rainfall and shallow sub-surface runoff. It covers roughly 62 hectares and sits in a flat, shallow basin typical of the steppe lagoons scattered across the La Mancha plain.

What will you see?

The lagoon's biggest draw is how dramatically it changes through the year. In summer, water evaporates quickly and white salt crusts form across the surface and shoreline, turning the basin into a cracked, sun-baked salt flat. After rain, the cycle reverses: dissolved salts return to the water and the lagoon regains its liquid character. It's during these transitional phases, when high salinity and sunlight favor halophile microorganisms, that the water can take on the pink tint typical of similar salt lagoons in Castilla-La Mancha.

Laguna de Tirez is part of the Natura 2000 network and is protected both as a Natural Reserve and as part of a Biosphere Reserve. The site stands out for a variety of hypersaline-habitat flora rarely found elsewhere in Europe, including some species considered endangered. The landscape is open and steppe-like — low halophile scrub, bare saline flats, and the flat horizon typical of the interior Castilian plateau.

How do you get there?

Laguna de Tirez lies within the municipality of Villacañas, south of the town center. Villacañas is in the province of Toledo, Castilla-La Mancha, and is well connected to both Toledo and Madrid. The lagoon is best reached by car, following local roads out of Villacañas toward the region's protected wetlands (humedales). The area also forms part of the Caminos Naturales walking and cycling route, which links the La Mancha wetlands between Villacañas and Quero.

When should you visit?

The best time depends on what you want to see. Spring and early summer, right after the rainy season, is when the lagoon holds the most water and offers the best chance of spotting its characteristic coloring along with waterfowl drawn to the wet habitat. Late summer and autumn instead reveal a dry, salt-crusted landscape with white efflorescence covering the basin floor — a different but equally distinctive view of the lagoon. As a protected natural area, visitors should stick to marked paths and respect conservation rules.

Frequently Asked Questions

Why does the water in Laguna de Tirez sometimes turn pink? The pink tint appears seasonally and is linked to the lagoon's high salinity, which favors the growth of halophile microorganisms common in the shallow salt lagoons of Castilla-La Mancha.

Does Laguna de Tirez dry up completely? Yes. During the summer months the water evaporates heavily and salt crusts form on the surface, turning the lagoon into a salt flat until rainfall refills it and restarts the cycle.

What protection status does the site have? Laguna de Tirez is part of the Natura 2000 network, functions as a Natural Reserve, and belongs to a Biosphere Reserve, owing to its unique hypersaline-habitat flora.

Are there other wetlands nearby worth visiting? Yes, Villacañas and its surroundings form part of a larger complex of La Mancha wetlands (humedales), linked by the Caminos Naturales route heading toward Quero.