Park your vehicle in the dirt car park on the right of the N116 as you descend. The start of the hike is just opposite, at the foot of a small oratory.
(S/E) Take the path that climbs along a huge stone wall up the mountain.
The trail, marked with large white paint strokes, is very well maintained by volunteers from the Notre-Dame-de-Vie association and winds its way up the mountainside. It's impossible to get lost as there is only one trail.
(1) After about ten minutes, you will find a small cave on your right (reserved for non-Muggles...). The few false trails that deviate from the main trail are clearly marked by piles of stones, indicating that they are not the right way.
(2) After 20 minutes of climbing (approximately 800m horizontally), with the mountainside mainly on your right, turn sharply to the right and continue climbing with the mountain on your left for about 10 minutes (400m horizontally). In half an hour to 45 minutes, you will reach the esplanade of the chapel.
(3) Descend to the fork in the first hairpin bend, where a wooden sign indicates "Notre Dame de Vie".
(2) Take a very small mule track on the right, which is much less well maintained but still bordered and supported by old dry stone walls. This is an old military surveillance path known as "Vauban", which is not signposted.
(4) Follow this poorly maintained path for a good half hour, littered with stones and scree that have fallen from the mountain or the walls, to reach the main path, known as "Chemin Vauban" (which climbs from Fort Libéria in Villefranche-de-Conflent, marked in purple on the IGN map). Pass just before the foot of a metal sculpture depicting the silhouette of a bird of prey in flight and a memorial plaque. Take the Chemin Vauban (unmarked) which climbs very easily for 4 hairpin bends.
You will reach a platform similar to those at the previous bends, where another clearly marked path leads into the undergrowth towards the nearby ridge. Do not take this path, as it will be the crossing point for the return journey, after the climb and the tour of Roc Campagna.
(5) Continue climbing to the right along the hairpin bends of the Chemin Vauban. Reach an altitude of 1,100 metres.
(6) Look for an unmarked trailhead on your left.
NB: This is a shortcut to the trail leading from the Chapelle Saint-Etienne to the Pla d'Aussa. If you cannot find this fork, you can take the longer route.
Rejoin the place where the track from the Chapelle Saint-Etienne to Pla d'Aussa becomes a path.
(7) Continue along this unmarked path on the left along the contour line to the place called Flagels, where the path suddenly climbs in several hairpin bends, gaining more than 70m in altitude. Reach the Pla d'Aussa, a vast moorland of low Mediterranean vegetation dotted with a few shrubs.
(8) Continue along the trail towards Roc Campagna, marked on the ground by a small cairn and a wooden stake painted red and yellow (like a snow stake used for road signs, but only 80 cm high). There are several ways to find it: either use GPS or look for a group of three distinctive trees on the edge of a clearing, then head straight east towards the Sant-Pere precipice to find it.
Then take a small path, which is also unmarked but marked with a few cairns, which descends gently and then climbs back up to the summit of Roc Campagna, which can be seen through the trees and bushes.
(9) Proceed with caution, using your hands, to reach the first of the Roc Campagna peaks.
From there, you will have a magnificent 360° view of the Têt and Rotja valleys.
You will also notice another peak, slightly lower, about a hundred metres ahead of the first one. It can be reached in a few minutes, again with caution. This peak is overgrown with large clumps of thorny vegetation, the likes of which I had never seen before. From here, you can see the villages of Serdinya and Villefranche, and the Mas de Lastourg campsite, with its swimming pool surrounded by ornamental trees.
You can then make out two other more modest peaks of Roc Campagna. So there are a total of four peaks, indistinguishable from each other from the valley, which form "Le" Roc Campagna.
Descend to the west (to earn the "Tour du Campagna" label) on a fun, fairly passable scree slope, but very steep (a drop of nearly 250 m over a distance of just 400 m) and without any path or markings.
At the end, keep well away from the south of the base of Roc Campagna (No. 4), cross the end of another Vauban trail coming from the west (barely visible) and look for the large rock with a large white arrow and a large dot painted on it, indicating the passage to the west.
NB: at the bottom of the scree, you can climb down directly to point (10), but it is better to veer west as indicated on the route.
(10) Then look for a small path on the slope, marked by several orange adhesive tape marks (and others in yellow) affixed to the vegetation and tree trunks. Head east down the slope, then generally north-east, almost on the contour line, taking particular care to stay on the path, which sometimes disappears into the vegetation or scree. Over a distance of about 750m between the 1000m and 900m contour lines, the route will reach the cliffs that block the path to the north-east.
NB: This part of the route is the most difficult, as the path is poorly marked (there are numerous adhesive markings, but they are arranged randomly and not in a standard pattern; sometimes there are red or yellow paint markings) and vegetation and scree have made it difficult to see over the years. Furthermore, unlike other parts of the hike, there are no longer any dry stone retaining walls on either side of the trail.
However, beneath the cliffs, this path joins another old Vauban path (in very poor condition). This path ends by skirting around a rocky outcrop. As you pass, you can clearly see a chasm on the right-hand side of the path (which may have been used as an ice house, as there is a low wall supporting the ledge in front of its entrance).
(5) Then return to the main Chemin Vauban at the end of a hairpin bend on a small platform (marked on the way there). Finish the tour of Roc Campagna here, following real paths, even though from the valley these slopes appear untouched by human passage! Turn right and descend the same path as on the way there (except for the chapel). Return to the car park where you started (S/E).