Head to Hell-Bourg, the starting point for this 4-day route, at the ‘Le p’tit blanc des O’ lodge.
(S) Head back up to take the Route Auguste Lacaussade on the right, as if heading towards Hell-Bourg. Cross the bridge and turn left into the car park towards the stadium.
Alternative route from the centre of Hell-Bourg: take Rue Olivier Manes (towards Ilet-à-Vidot) and, at the right-hand bend, carry on straight ahead along the path leading to the sports hall.
Head towards the stadium.
(1) Walk alongside it, keeping it on your left, and quickly start climbing the winding path. You’ll reach a viewpoint at the top station of the Monte Charge.
(2) Stay on the path and, heading steadily south-west, reach a junction of paths.
(3) Leave the path leading to La Vierge on your right and continue straight ahead. The slope begins to rise and soon becomes steep before ending at Les Échelles, which leads further on to the Caverne Mussard. Here, rejoin the GRR1.
(4) Turn right here, follow the crest of the caldera, and reach the point directly below the summit of the Trois Petits Bonhommes.
(5) Continue along theGR® to reach the Refuge de la Caverne Dufour at a leisurely pace (E).