From Olette, head up the D4 towards Sansa. At around 1,275 m, turn left at the Pont de Railleu, staying on the D4 and leaving the road to Sansa behind. Park in the car park near Railleu church.
(DA) From the car park, head north and turn left towards the town hall. Cross the D4 and continue straight ahead. A few metres further on, turn right, heading due north, onto the signposted path: Sansa 2.5 km. After a short climb, you’ll reach the signpost for Avellanosa
(1) Head north-west towards Sansa. Cross the Ribera de Cabrils and join the D4e road.
(2) Follow it to the left for a few hundred metres. Pass the old Blazi flour mill (with information boards) and, at the bend to the right, leave the road to take the path climbing to the left. This is a fairly challenging climb up to the junction (elevation 1442).
(3) Take the track to the left (Sansa is on the right). Cross the Ribera de Cabrils once more and follow the ridge path to the Col du Dragon (Coll del Dragó), which offers a beautiful panorama from Canigó to Pic Redoun.
(4) Carry on straight ahead and, a few metres further on, take care as the path is no longer clearly marked. We recommend keeping a close eye out for the yellow-marked posts. Continue due west to the D4 (elevation 1538).
(5) Cross this road and take the path leading off to the left, heading due south, at the signpost. Further on, cross the Rec de Fontanal Gros via a footbridge and join a track a few hundred metres further on.
(6) Follow the track to the left for about 600 metres.
(7) Leave the track and take the path that climbs to the right. Be prepared, as the climb is quite steep up to the Collada.
(8) Head straight ahead and take care on this section, where the yellow markings are very patchy, particularly as they are not present in both directions.
We recommend looking back from time to time to make sure the markings are still there
Furthermore, do not rely on the IGN map, as the route shown is not at all the same as the actual terrain.
You’ll reach a vast flat area; continue south-east to rejoin a track and the ubiquitous yellow markings, which will lead you onto the D4f road.
(9) Take the road on the left for about 300 metres.
(10) Leave the road to take the path that descends to the right, runs alongside the River Caudiès and brings you back onto the road.
(11) Head straight on to reach the Railleu car park via the Moulin del Bac, bringing this very pleasant outing to an end (S/E).