Piton de la Fournaise

Piton de la Fournaise is one of the most active shield volcanoes in the world, rising in the south-east of Réunion, a French overseas department in the Indian Ocean. Eruptions occur roughly every year or two and are usually effusive, sending lava across the surrounding Plaine des Sables lava desert and, in rare cases, down to the coast, rather than exploding violently. The standard visit begins at the Pas de Bellecombe car park, reached on the Route du Volcan, where a viewpoint looks over the Enclos Fouqué caldera. From there a stepped path descends the caldera wall and crosses bare black lava to the base of the Formica Leo cone, then climbs to the rim of the Dolomieu crater and the neighbouring Bory crater. Visitors walk over cooled lava flows of different ages, where fresh black basalt, reddish scoria and twisted ropy surfaces show the layers of successive eruptions. The full round trip to the summit rim takes about four to six hours, with roughly two to three hours each way, and there is no shade anywhere on the route. Weather changes quickly: the crater is often clear at dawn and wrapped in cloud by late morning, which is why many hikers leave Bourg-Murat around 04:00 to start walking at first light. The best vantage points are the Pas de Bellecombe rim for the full caldera panorama and the Dolomieu crater edge for views into the steaming summit crater. Crowds are heaviest on weekends, public holidays and school breaks, and thin out on weekdays and early in the morning. Access to the trail is controlled by the volcanic alert level and can be closed at short notice, so visitors check the status of the Observatoire Volcanologique du Piton de la Fournaise before driving up. The Maison du Volcan in Bourg-Murat provides context on eruption history and live monitoring when the summit is closed. A car is required, as no public bus serves the trailhead; the drive from Saint-Denis takes about an hour and a half. Sturdy shoes, layers, water and sun protection are essential on the exposed lava.