La Besurta y el Plan d'Aigualluts (Forau de Aigualluts)

The map shows the trailhead and parking for this route alongside the mountain lakes, waterfalls, viewpoints, mountain huts and villages catalogued nearby, with verified coordinates. We do not draw route tracks: follow official signage and IGN maps.

No official track is available.

Reference coordinates for La Besurta y el Plan d'Aigualluts (Forau de Aigualluts): 42.68530, 0.66260. We only publish track links when they come from an official or authorised source.

How to get there

Via the A-139 to Hospital de Benasque and then the paved track to La Besurta. In peak season access is regulated and done by shuttle bus.

Where to park

Car parks at Hospital de Benasque and La Besurta, subject to summer regulation.

Public transport

Benasque - Hospital de Benasque - La Besurta shuttle bus in peak season.

The hydrological phenomenon was confirmed by the French speleologist Norbert Casteret through water colouring tests, solving a puzzle debated for centuries.

El Forau de Aigualluts es un sumidero kárstico abierto en calizas: el agua de deshielo del Aneto se sume aquí y reaparece en el Valle de Arán, en los Uelhs deth Joèu.

Pradera glaciar llana recorrida por meandros, con la mole del Aneto cerrando el fondo del valle.

Viewpoints and lookouts

• Balcony overlooking the Forau de Aigualluts

Photography

• Forau de Aigualluts waterfall
• Plan d'Aigualluts meadow with the Aneto in the background
• Reflections in the stream's meanders

• Marmot
• Chamois
• Griffon vulture
• Brown trout

• Mountain pine
• Alpine grassland
• Bilberry
• Mountain buttercups

• The water that sinks at the Forau de Aigualluts reappears in the Aran Valley, at the Uelhs deth Joèu, and ends up in the Atlantic instead of the Mediterranean. This was proven with dye tracing by Norbert Casteret in 1931.

• Go early: it is the busiest route in the valley.
• Can be extended to the Renclusa hut or the Plan dels Estanys.

• Sports or trekking shoes
• Light warm layer
• Water
• Cap

Sendero ancho y muy transitado, con piedra suelta y rocas resbaladizas junto al agua.

Agua en el entorno de La Besurta y la Renclusa; no siempre tratada.

• Sudden weather changes
• Slippery rocks near the water

We do not publish our own forecasts. The mountain forecast for the area (Aragonese Pyrenees / Posets-Maladeta massif) is issued by AEMET, and snow conditions and avalanche risk should be checked in the official avalanche bulletin. Afternoon storms are common from June to September and conditions can change within hours.

• AEMET — Mountain forecast
• AEMET — Avalanche risk bulletin

• Much of the valley lies within the Posets-Maladeta Natural Park: wild camping is forbidden (only authorised bivouac above 2,000 m between dusk and dawn, under current regulations).
• No fires, no collecting flora, fauna or minerals, and no leaving marked trails in sensitive areas.
• Dogs must be kept on a leash. In grazing areas and areas with protected wildlife their presence may be restricted.
• Drones require express authorisation from the Natural Park's managing body.
• Vehicle access to the Hospital de Benasque and La Besurta is regulated in summer: check the official shuttle service.
• Take all your rubbish with you, including organic waste and toilet paper. Mountain emergencies: 112.

Photographs of the La Besurta y el Plan d'Aigualluts (Forau de Aigualluts) area in the Benasque Valley, optimised in WebP for mobile and desktop.

Plans generated automatically from the distance, elevation gain and difficulty of the catalogued trails. They do not include timetables, prices or opening hours: check official sources before doing this activity.