With a difference in altitude of 1400m but you can spend the night at the Tuquerouye refuge located near the lake (be careful to inquire beforehand because works are planned).
The departure is made from the parking lot, signs will guide you. After a wooded area very pleasant on hot days you will be at 1600m and will already have a breathtaking view of the Piñeta Valley, the Tres Marias (Three Marys) and the majestic Cinca waterfall.
When you arrive at the latter, you can stop and refresh yourself. From here the path becomes stony but still very well marked. A series of twists and turns will take you very quickly to the Balcony of the Piñeta (2600m). Beautiful place where you feel humbled by this grandiose site!
The hike continues between the boulders and will take you directly to the Marboré lake, at the foot of the Lost Mountain and the Cylinder. The Tuquerouye refuge is located in the narrow passage of the breach of the same name facing Mont Perdu. I took the time to admire these peaks ranked among the highest in the Pyrenean chain (3rd and 11th).
The return is by the same route with nice surprises if you go off the beaten path.