Trail du Roc d'Enfer

The Trail du Roc d'Enfer is a 45-kilometer trail race with 3,000 meters of elevation gain that takes place in the Chablais massif, in the Haute-Savoie department, starting from Morzine. The Roc d'Enfer, which culminates at 2,244 meters, is the highest point of the Savoyard Chablais and gives its name to a race that ranks among the most beautiful in the department. Morzine, a dynamic mountain resort situated at 1,000 meters of altitude, is famous for its Portes du Soleil ski area and its growing commitment to summer outdoor sports.

The Chablais massif is a pre-Alpine territory situated between Lake Geneva to the north and the Arve valley to the south. It is distinguished from neighboring Alpine massifs by its particular geology, dominated by limestone thrust sheets that have created mid-mountain landscapes with gentle and rounded forms, punctuated by cliffs and gorges. The Chablais has been classified as a UNESCO Global Geopark since 2012, testifying to the exceptional geological interest of this territory.

The Trail du Roc d'Enfer course takes runners through the varied landscapes of the Haute-Savoie Chablais. Starting from Morzine, the route first leads through spruce and fir forests covering the slopes of the Dranse de Morzine valley. The trails then climb toward high-altitude pastures, vast grassy expanses where Abondance cattle graze, whose milk is used to produce Abondance PDO cheese. The highest point of the course, on the slopes of the Roc d'Enfer, offers spectacular views of Lake Geneva, the Swiss Alps, and the Mont Blanc massif.

With 3,000 meters of positive elevation gain over 45 kilometers, the Trail du Roc d'Enfer is a demanding event that tests the physical and mental capabilities of runners. The climbs are sustained and the trails become technical in the upper parts of the massif, where exposed limestone rock can prove slippery. Fast descents through the undergrowth demand good technical control and constant attention to roots and rocks.

The Chablais benefits from a climate influenced by the proximity of Lake Geneva, which moderates temperatures and generates higher relative humidity than in the interior Alpine massifs. Summers are generally pleasant, with moderate temperatures at altitude, but precipitation is frequent and fog can envelop the summits. Runners should be prepared to move in humid conditions.

For international runners, Morzine is very well located. The resort is approximately 80 kilometers from Geneva airport, less than an hour and a half by road. It is also accessible from Thonon-les-Bains and Cluses via well-maintained mountain roads. Accommodation in Morzine is abundant and varied, the resort having significant hosting capacity linked to its winter and summer tourism activity.

Assistance on the Trail du Roc d'Enfer is an appreciable asset. The Chablais road network allows access to several points along the course, and an assistant familiar with local roads and paths can optimize runner support. Nutrition management is important over this distance, and personalized accompaniment can significantly improve the racing experience.

The Trail du Roc d'Enfer is a race that reveals the little-known beauty of the Chablais, a massif often overshadowed by its more famous neighbors. It is an event that appeals through the variety of its landscapes, the richness of its natural heritage, and the warm welcome of the Haute-Savoie mountains.

Trail du Roc d'Enfer is a 45 km trail race with 3,000 m of elevation gain, located in Morzine, Haute-Savoie. The next edition is scheduled for 12 July 2026.

Find all official information on the race website.