From Sentein town centre, take the D4 south towards Eylie. About 5 km after Sentein, leave the road on the left leading to the Eylie Lodge and continue straight on for 400 m to the Bocard d'Eylie car park on the banks of the Lez.
(S/E) From the car park, head south on the track that passes by the ruins of an old factory. Cross the Lez river right next to these ruins and continue along the right bank of the Lez (east side), surrounded by the Bois des Rochers de Bastard and Bois de Ruérech woods, following the GR®T52. Cross the Lez again shortly before it joins the Ruisseau d'Urets and continue along the left bank (north side) of the Lez on the road. You will reach a clearing.
(1) At the end of the carriage road, turn left onto the GR®T52 and cross the Lez one last time on a footbridge. The path begins to wind its way around and passes by the ruins of the Urets laundry. After these ruins, enter the Bois du Past forest heading south, following the many twists and turns. The trail catches up with the Ruisseau d'Urets on its left bank (west side), then reaches a small clearing under the Haus fir forest, home to the Cabane d'Haou.
(2) Pass the hut and continue south. Go around the Urets stream waterfall to the west, then head south again. The trail leaves the woods and continues south to the Urets dam.
(3) At the dam, continue straight south on the GR®T52. Go around a limestone outcrop to the west, then continue south to Port d'Urets, passing by the remains of the old mining operation. A handrail has been installed just before the port to secure a tricky passage.
(4) At Port d'Urets and its hut, cross over to the Spanish side and turn right towards the west, still on the GR®T52. The path is more or less flat and overlooks several small lakes and Lake Montoliu. The trail crosses a scree slope for about 200 metres. Then, 200 metres further on, the final ascent begins.
(5) At an altitude of about 2,550 m, leave the GR®T52 and take the path on the right towards the north-west to begin the ascent of Maubermé. From here, the path is no longer marked, but it is well cairned and fairly visible. The path goes around a rocky outcrop to the west, then heads north under Maubermé. The path, which is still visible, goes around Maubermé to the west, then heads east to begin the final climb up a steep scree slope, but with numerous switchbacks to make the climb easier (beware of latesnowfields ). Finally, just below the summit on the north side of Maubermé, the trail turns sharply south to reach the summit.
(6) At the summit, retrace your steps to return to the car park (S/E) via the same route you took on the way up.