Park your car at the Pont d'Espagne car park at an altitude of 1460m.
(S/E) Start by taking the winding road.
(1) Turn quickly left towards Lac de Gaube. This is also the route of the GR®10, which you will follow to the Refuge des Oulettes de Gaube. The path is quite steep at first, but then the gradient eases.
(2) Pass by Lac des Huats at 1666m and continue to Lac de Gaube at 1730m.
(3) You walk along it on the right as you climb (left bank). Lac de Gaube is a very clear blue lake. The path crosses scree and begins to climb again shortly after the lake.
There is still a long way to go and the path climbs in stages. However, the gradient is never too steep. You cross the Gave des Oulettes twice. The forest has now disappeared and you can start to see the peaks of the Vignemale in particular.
(4) Take a break at the Oulettes de Gaube refuge at 2151m, then take the same path in the opposite direction to return to the starting point (S/E).