Starting point: Bourdalès, about 10 km past Bagnères-de-Luchon on the road to Superbagnères (D46A). There are two car parks at the bottom of the valley along the road: the route shown on the map starts at the lower car park, situated on the left just past the first houses in Bourdalès.
(S) At the far end of the car park, take a path heading south. Join the D46A at the upper car park and follow it to the left, towards the power station.
(1) Just before the power station, take the path leading off to the right through the hazel bushes, towards Gouffre d’Enfer, Ru d’Enfer and Mines des Crabioules. Climb the well-marked path as it winds upwards. Then head due south across the terrain. Cross the Ruisseau d’Enfer via a footbridge and continue climbing the winding path.
(2) At the junction, continue straight on towards the Gouffre d’Enfer.
(3) Cross the torrent via the bridge spanning the chasm. The path continues in switchbacks towards the Anciennes Mines des Crabioules.
(4) At the fork, if you wish, carry on straight on to the Ru d’Enfer with its impressive gorges.
(5) Retrace your steps.
(4) Then take the path that climbs towards the Anciennes Mines de Crabioules (on the left if you’re returning from the Ru d’Enfer, on the right if you skipped that detour). Climb the winding path, then head south-south-west. Follow the path as it winds again to pass above the old mine.
(6) Continue westwards, where the path is less clearly marked. Head for the southern flank of the Pic de Sarnès and then the Cabane de Sarnès. A few cairns indicate the direction.
(7) From the Cabane de Sarnès, join a small path from behind, marked by slightly faded red markings and cairns. The path turns south-east, then south. At the bottom of the cirque, you’ll reach an open gully.
(8) Follow the gully, which runs almost horizontally, heading south-east. After the gully, the path climbs north-east.
(9) Descend a small metal ladder (about 2 m) to get past a rocky outcrop. Shortly afterwards, a sign points to the Refuge du Maupas to the right. Head east and climb up a scree slope (steep and difficult), keeping as far to the right of the grassy slope as possible. You’ll arrive beneath a rocky ridge.
(10) Turn left and follow the base of the rock outcrop on your right-hand side. You’ll reach a gap marked by a white post. A chain helps you cross the final rocky gully in the gap. This brings you to the foot of the Refuge du Maupas (panoramic terrace) (E).