0 km - Leave the car park and head for the Piton de la Fournaise viewpoint, standing in the middle of the Enclos. There’s an orientation table close to the viewpoint. You then head off to the left.
0.5 km - After a short descent, you reach the gateway to the Enclos. Continuing straight ahead, the path leads to Piton Partage. Just above the gateway is a very nice viewpoint of the Enclos and the Formica Léo. Once past the gateway, you begin the descent into the Enclos Fouqué.
0.8 km - You quickly reach a sloping ledge 50 metres long which marks two-thirds of the descent.
1.0 km – You’ve reached the foot of the rampart, in the Enclos, and now head towards the Formica Léo crater. It owes its name to its resemblance to the crater formed by the larva of the ant-lion, an insect that traps and feeds on ants. Because of heavy erosion, we advise you not to climb on this small crater.
3.4 km - Halfway up, take a short break because the lack of oxygen and especially the heat really make their presence felt.
4.3 km - You have arrived between what remains of the Trou de la Soufrière and the Julien Crater. La Soufrière is a volcanic vent with a yellowish colour due to the sulphur. It partly collapsed following the 2007 eruption. The summit of Dolomieu is nearby and the trail continues on a slight gradient.
5.5 km – You’ve arrived at the edge of the crater! An observation platform is outlined with a white mark. Don’t cross this line due to the risk of landslides. This won’t stop you admiring the gaping 300-metre-deep chasm right in the middle of a beautiful rocky landscape. The return trip is by the same route, which ends with a steep 100-metre climb to go out of the Enclos Fouqué and return to the car park.