The route starts at the Santa Bàrbara Chapel, just before the small village of Perillos. Parking is available in a small car park.
(S/E) Head towards the chapel, then take a small path heading north-east. Descend into a small field, then head towards a cliff. Follow this path, which runs the entire length of the Coume de Ferro and passes a climbing site.
(1) Leave the path to the right to take a short detour and explore the Cauna cave (pleonasm). Then head left to rejoin the path, which heads east and quickly turns into a track. Follow this track for about 2 km, ignoring all side paths. You’ll reach a three-way junction.
(2) Leave the track and take the path branching off to the left, heading north, clearly marked by a large cairn. This path winds through the woods, where the vegetation can be rather dense at times, and climbs to reach a junction clearly marked by two large cairns.
(3) Turn right; otherwise, you risk heading straight up to the radar station and missing out on the superb view to the east. Follow this well-marked path until you reach, on the ridge, another path coming from the right (north-east).
(4) Turn left to follow this enjoyable path through the limestone, keeping an eye on the cairns and the blue paint markings. You’ll reach Montolier de Perellós with its weather station, a white sphere visible from everywhere, particularly from the motorway.
(5) Go round the station on the right and enjoy the view over the Aude. You have now reached the northernmost point of the Pyrénées-Orientales. Continue along the track heading west-south-west. Carry on until you reach a hairpin bend to the left.
(6) Turn right onto another, narrower track that winds along the ridge, going up and down. Head for the Coll de Ladàs.
(7) Leave the track that continues straight ahead and take the one on the left. Walk for about 500 m.
(8) Leave the track that turns right, towards the south, and take the path opposite, heading due east. This path, clearly marked by cairns, is sometimes overgrown and crosses several streams before joining a wider track.
(9) Turn right, then rejoin a track and follow it to the right. Pass a fire tank and join the access road to Périllos.
(10) Follow it, turning left.
(11) Take the path on the left, which serves as a shortcut, rejoin the road, then take another path – this time on the right – to avoid a hairpin bend and head straight back to the chapel car park (S/E).
