The GR R2 , often considered one of the greatest hiking challenges in the Indian Ocean, crosses Réunion Island from north to south, from Saint-Denis to Saint-Philippe . This 142-kilometer trail takes hikers through spectacular and varied landscapes, blending active volcanoes, breathtaking cirques, rainforests, and black sand beaches. It's an immersive experience in one of the world's most beautiful tropical regions, combining physical challenges with the discovery of unique natural beauty.

The GR R2: Distance, Duration and Elevation Gain

A Challenging Long-Distance Hiking Trail

The GR R2 is a long-distance hiking trail renowned for its difficulty. With 10,918 meters of elevation gain, it demands excellent physical condition and exceptional endurance. It is generally completed in 10 to 12 days , with some stages lasting over 8 hours. This trail is a challenge for hikers, but those who venture onto it are richly rewarded by the breathtaking beauty of the landscapes they traverse.

Unlike other trails, the GR R2 immerses you in very different ecosystems depending on the altitude: from the lowland rainforests to the lunar landscapes of volcanic areas. This diversity makes it one of the most fascinating hiking routes in the world.

Elevation Changes and Climate Variations

One of the main challenges of the GR R2 lies in its impressive elevation changes. Hikers should expect to be going up and down almost constantly, with steep slopes and rugged terrain. Furthermore, Réunion's tropical climate means that weather conditions can change very quickly. In lower areas, the heat can be oppressive, while at higher altitudes, temperatures can drop rapidly.

Hikers must therefore be well-prepared and equipped to cope with these climatic variations, carrying lightweight clothing for warmth as well as extra layers for higher sections. The trail presents constant challenges, but for those willing to overcome them, each day brings unparalleled rewards in terms of views and discoveries.

Highlights of the GR R2: From Cirques to Volcanoes

The Cirque de Mafate: A World Out of Time

The Cirque de Mafate is undoubtedly one of the most isolated and spectacular places on Réunion Island. Accessible only on foot or by helicopter, Mafate is a world apart, where hikers can immerse themselves in unspoiled wilderness. This long-distance hiking trail plunges walkers into deep gorges and verdant valleys, surrounded by towering cliffs. The hamlets , these small, isolated villages scattered throughout the cirque, offer unique opportunities to meet the inhabitants who live there in complete self-sufficiency.

Crossing the Cirque de Mafate on the GR R2 is an unparalleled experience, allowing you to fully appreciate the beauty and solitude of Réunion's mountains. The winding paths offer spectacular views of impressive waterfalls, and the lush vegetation contrasts sharply with the rugged rock formations. Hikers who reach Mafate are often struck by the calm and serenity that reign in this timeless place.

Piton des Neiges: Roof of the Indian Ocean

The highest point on Réunion Island at 3,071 meters , Piton des Neiges is an essential stop on the GR R2 long -distance hiking trail. Although its ascent is one of the most challenging parts of the hike, it is also one of the most rewarding. From the summit, hikers can admire a 360-degree panorama of the entire island, with an unobstructed view of the three cirques (Mafate, Salazie, and Cilaos) as well as the Indian Ocean.

The ascent usually begins from the Caverne Dufour refuge, located at an altitude of approximately 2,400 meters. This stage is often undertaken at night to reach the summit for sunrise, an impressive natural spectacle. Although Piton des Neiges is an extinct volcano, its imposing presence continues to dominate the island and fascinate hikers.

Piton de la Fournaise: A Fascinating Active Volcano

In contrast to Piton des Neiges , Piton de la Fournaise is an active volcano and one of the most closely monitored in the world. This site offers a unique experience to hikers on the GR R2 trail, who have the opportunity to walk through breathtaking volcanic landscapes. Crossing the Plaine des Sables , a desert-like expanse of red and black ash, gives the impression of walking on another planet.

The hiking trail leads walkers to the crater rim, where it's possible to observe fumaroles and sometimes even lava flows during eruptions. This section is undoubtedly one of the most impressive of the entire hike, as it showcases the raw power of nature in action.

Preparing for your hike on the GR R2

Good physical condition and appropriate equipment

The GR R2 is a long-distance hiking trail that requires serious preparation. The long stages, steep terrain, and variable weather conditions make this hike a significant challenge. It is recommended to train several months in advance to be physically ready to tackle the steep ascents and descents.

When it comes to equipment, it's crucial to be well-equipped. Sturdy, waterproof hiking boots are essential, as the terrain can be very rugged and sometimes muddy. A lightweight but well-organized backpack is also vital, with clothing suitable for the island's varying conditions, from tropical heat to the cooler temperatures at higher altitudes. Hikers should also carry sufficient energy snacks and water, as some sections of the trail are far from any resupply points.

Bivouacs and Refuges: Where to Sleep on the GR R2

The GR R2 trail is dotted with several mountain huts where hikers can spend the night. While these huts offer basic comfort, with dormitory beds and often simple meals, it is recommended to book in advance, as demand is high, especially during peak season. These huts allow hikers to rest after long days of walking while enjoying the friendly atmosphere and hospitality of Réunion Island.

For those who prefer a more nature-oriented experience, bivouacking is also permitted in certain areas of the GR R2 . Pitching your tent high in the mountains allows you to fully enjoy the starry nights and the soothing silence of the surrounding nature. However, it is important to respect local environmental protection regulations.

Reunion Island: A Jewel of Biodiversity

Endemic Fauna and Flora

One of the most fascinating aspects of the GR R2 is the rich biodiversity found along its route. Reunion Island is home to a large number of endemic animal and plant species, found nowhere else in the world. Hikers on this long-distance trail will have the opportunity to encounter iconic species such as the Réunion cuckoo-shrike (tuit-tuit) , a small bird endangered by extinction, or the Réunion stonechat (tec-tec) , another bird species unique to the island.

The flora is equally remarkable, with dense rainforests, giant ferns, and wild orchids. The GR R2 long -distance hiking trail crosses several nature reserves, some of which are UNESCO World Heritage sites, thus guaranteeing the preservation of these unique ecosystems.

A Sensory and Visual Journey

Each stage of the GR R2 is an immersion into a new world, with landscapes more breathtaking than the last. Whether traversing mountain cirques , walking on volcanic rocks, or following tropical rivers, the GR R2 offers an unparalleled sensory and visual experience. Every day on this long-distance hiking trail is an opportunity to discover a different facet of the island, with colors, sounds, and scents that vary with the altitude and environments encountered.

Hikers can admire majestic waterfalls cascading into natural pools, explore lush forests where sunlight filters through the thick leaves, or contemplate the vast desert landscapes of the volcanic regions. This diversity makes the GR R2 a true microcosm of Réunion's natural beauty, where each stage holds its own surprises.

The Human Experience on the GR R2

Unforgettable Encounters

Beyond the natural beauty of the GR R2 , one of the most striking aspects of this adventure is the human element. Hikers traversing this trail often share convivial moments in mountain huts or along the way, exchanging stories and advice. Whether with the inhabitants of the hamlets in the Mafate cirque , or with other trekking enthusiasts, these encounters are frequent and enriching.

Reunion Island is also known for the hospitality of its inhabitants, who readily welcome hikers with warmth and generosity. Whether it's sharing a Creole meal in a guesthouse or offering advice on how to overcome a difficult section, mutual support is ever-present on the GR R2 . It's as much a social experience as a physical one, and every encounter enriches the journey.

A Personal Challenge

Finally, for many, the GR R2 is much more than just a hike. It's a personal challenge that allows you to push your limits, both physically and mentally. The long days of walking, the sometimes difficult conditions, and the relative isolation of certain stages offer a genuine opportunity for introspection and reflection. Each completed stage is a personal victory, and arriving in Saint-Philippe , after traversing the entire island, is a moment of pride and accomplishment.