The reservoir created by the dam has a storage capacity of approximately 2.5 million cubic meters of water.
The dam is part of a series of hydroelectric installations that utilize the significant hydraulic gradient of the Pyrenees mountain range.
The Lac des Gloriettes serves as a primary access point for the Cirque d'Estaubé, which is less frequented than the nearby Cirque de Gavarnie.
The lake water levels fluctuate significantly throughout the year depending on snowmelt and hydroelectric power demand.
Geologically, the area is defined by complex sedimentary limestone structures typical of the High Pyrenees.
Barrage des Gloriettes is a masonry gravity dam situated in the Gavarnie-Gèdre region of the French Pyrenees, creating the artificial Lac des Gloriettes. Positioned at an elevation of approximately 1,668 meters, the dam collects water from the Gave d'Estaubé stream. The structure serves as a gateway to the Cirque d'Estaubé, a UNESCO World Heritage site known for its glacial topography. The lake created by the dam is surrounded by high mountain peaks, including the Pène d'Héas. Visitors can access the area via a narrow paved mountain road that leads to a parking area situated near the dam wall. The site is a common starting point for alpine trekking routes leading deeper into the Pyrenees National Park.
The crest of the dam wall provides a panoramic view of the lake with the Cirque d'Estaubé peaks in the background.
Wear sturdy, waterproof hiking boots, as the trails around the lake involve rocky and uneven terrain.
Bring layers even in summer, as temperatures drop rapidly at this altitude and weather shifts quickly.
Carry sufficient water and sun protection, as there is virtually no shade along the lake perimeter trail.
Do not attempt to swim in the reservoir, as water temperatures are extremely low and currents near the intake valves can be dangerous.
Access road may be restricted or closed during winter and early spring due to snow and avalanche risk; no services are available on-site.
Practice Leave No Trace principles; keep dogs on a leash due to grazing livestock in the surrounding pastures.
