From Le Perthus, take the D71 then the D71a to park at Coll de l'Ullat, very close to the Albère chalet-inn.
(S/E) Set off from the yellow signposts located along the road just after the chalet-inn car park. Climb through the forest towards Roc dels Tres Termes (rock of the three terms) via theGR®10. The climb is slow as it is relatively steep. Arrive at the first ridge. Keep to the right to reach the rocky plateau of Roc Foirós (panoramic views of the French (right) and Spanish (left) landscapes with the Pyrenees mountain range).
(1) Turn back to rejoin theGR®. A little further on, continue along the left, entering the undergrowth again. TheGR® winds its way along flat ground until it joins the tarmac service road.
(2) Just before this, climb a few metres to the right to continue following theGR® and its markings, which appear regularly on rocks. It is on the left at the French-Spanish border, marked by barbed wire. Continue climbing, keeping the TDF relay antenna in sight. There are beautiful views to the right over Spain and the sea in the distance, behind you and to the left over the Pyrenean mountains and the Roussillon plain. You will arrive at the summit of Puig du Neulós (360° panorama; stone building dating from 1886; IGN geodetic marker).
(3) Take the gentle descent along the fence surrounding the relay station. Return to the service road and descend to the second crossroads with a track. Leave theGR®10. Turn right onto this stony then grassy path marked in yellow. Pass a rock lying across the path before turning left to descend, then further on to the right (path marked in yellow). The path passes a watering hole for livestock, approaches a meadow, crosses it at its end and continues downhill through the undergrowth. At its end, it leads to a DFCI forest track. Old orientation table with a beautiful view of the Roussillon plain.
(4) Turn left (south-west) onto this track and follow it until it joins the service road. Then keep to the right.
(5) Carefully follow the service road (busy in summer) which descends gently to Coll de l'Ullat and the car park (S/E).