Park in the Gorges de Bourdolés car park.
(S/E) Head towards the cascade d'enfer (you can go to the end of the road to see it and then retrace your steps).
(1) Before the end of the road, take a path on the right towards the Gouffre d'Enfer (route no. 43). Cross the Ruisseau d'Enfer on a bridge and begin a series of switchbacks to reach a crossroads of paths.
(2) Take the path on the right towards the Gouffre d'Enfer.
Climb up to the promontory for a superb view of the Gouffre d'Enfer (a tricky climb, but made easier by the handrail on the way down).
Continue uphill, crossing the stream again on the upper bridge. Reach the Mine de Crabioule crossroads. Continue straight on, leaving the track on your right. Arrive at the Ru d'Enfer, cross it to get a view of the Gorges du Ru d'Enfer (go to the middle of the ru on stones to get the best view of these gorges).
(3) Return to the Gouffre d'Enfer crossroads.
(2) Turn right towards Prairie de l'Artigue (path no. 42). Be careful as the signs in this direction are not very visible. Reach the meadow just after the footbridge over the Houradade stream.
(4) Turn left onto path no. 40 towards the Vallée du Lys. Begin a series of steep switchbacks to arrive opposite the Cascade du Coeur.
(5) Continue downhill along this path back to the start car park (S/E).