Early in the morning, you will start from Plaza deth Haro in Les, the center of the popular fire festival each Summer Solstice, and a UNESCO World Heritage Site. From there, you will go up to one of the most typical and beautiful villages of Aran; Canejan, perched in the middle of the mountain. You will be then in Val de Toran, the wildest valley. You will cross through charming villages, abandoned villages and old cattle roads. Toran’s valley will take you step by step to the important mining past of Val d’Aran. A long ascent from San Joan de Toran will carry you to Liat’s lake. You will get close to Mauberme’s base, an important mountain of 2,880m. Port de Urets’ passage, at 2,500m is one of the highest points of the race. A few meters away, and leaving behind the old mining tunnels, you will run through the antique iron mines of Urets, with panoramic views over Montoliu’s lake and the principal chain in the Pyrenees; Aneto and Maladetas, Montarto, Montlude… After achieving Montoliu´s pass, a long but easy to run descent will take you to Montgarri’s Sanctuary. From Montgarri, after a smooth ascent, you will arrive at Pla de Beret. After traversing the plateau, at 1.800 m above sea level, you will have to go down to the valley. Two villages will be waiting for you; Bagergue, declared one of the most beautiful villages in Spain, and Salardú, Naut Aran’s capital.

From Salardú, the landscape changes completely; you are getting close to the National Park of “Aigüestortes i Estany de Sant Maurici”. The pass through Porèra will give you an outstanding panoramic view of all the mountains in the Park. Right after you will go by Banhs de Tredòs, natural hot springs known since the Roman era, which are the door to the National Park. You will then reach the cirque lake of Colomèrs, with more than 50 lakes, which form the biggest glacial cirque in the Pyrenees. You will run by more than 20 lakes, reaching Pòdo’s pass, the other highest point of the race, at 2.600 m. You will leave on your right side Colomèrs lakes to confront Ribereta’s pass, change of valley and go through Montcasau lakes. An easy and fast descent will take you to Ressèc, in the valley of Valarties. From there to the finish line, two last demanding ascents will be waiting for you; 700 meters and 300 meters, to crown Tuca’s peak. Over there, you will have Vielha at your feet. Last kilometres will run through the forest and will take you to the end of the race. One hundred and five kilometers where you will go through the whole valley and its landscapes.