After passing Pont des Albrands and just before the junction with the track that goes up to La Pousterle, park where you can and look for a bridge on the left below you. This is the start of the Blue Thistle Trail.
(S/E) Go down and cross the bridge. Follow the path through the woods until you come to a large meadow, La Murègne. Look for the crossroads.
(1) At this crossroads, ignore the path that branches off to the right and continue straight ahead along the path that crosses the meadow. Continue through the woods until you come to a clearing called Boujurian. Pass the first chalet and continue to a crossroads.
(2) Take the path that climbs to the left, pass in front of some chalets, then continue along the path through the forest and pass through an area of scree caused by winter avalanches. Then, pass through the forest. The path begins to level out and the first thistles appear. This is the entrance to the reserve.
(3) At the entrance to the reserve, continue along the path to the crossroads near a footbridge.
(4) Ignore the trail that crosses the Torrent du Fournel and leads to the car park, but continue straight ahead. Stay on the trail at all times. Cross the Deslioures Biological Reserve and continue along the trail. Enter the forest. The path continues through the forest and ends in an area cleared by winter avalanches. This is Le Ravin des Trois Queyrons, the end point and return point.
(5) Return via the same route to the Pont des Albrands car park (S/E).
