The walk starts at the Saint-Paul de Mausole monastery via a nice wide road in the direction of the protected area of La Caume. Via the GR6 you ascend through a beautiful valley to the plateau de la Caume. On the plateau you will already have some beautiful views. From the plateau it continues in the direction of the famous Rocher des Deux Trous. The two "windows" in the rock provide a spectacular picture. You start a steep descent via a viewing point and then start the climb to Mont Gaussier. You get a secured passage with cables to handle at a narrow elevation and a metal ladder before you reach the top. The panorama is fantastic, with clear weather you can even see the Mont Ventoux. Now a very steep descent leads you to the D5. You cross the D5 and you soon arrive at the picturesque Lac de Peirou. Here it is great to pause and enjoy the view of the lake. Via the GR6 you now start an adventurous climb to the "chimney". Via a secured passage with cables you reach the beginning of the 'chimney', high above you see the sky through a large hole. You climb up a few metal steps and a secured passage. Once you have overcome this obstacle, the descent to the D5 begins, which you follow to the starting point.