Meeting with the guide at the starting point. Presentation, review of material and route start. After we will go by taxi to the Planell of Aiguestortes from where we will start the trekking route.We will pass by the Estany Llong Refuge. We will continue going up towards the Agulles de Delluí and we will pass through the Delluí pass at 2.557m /8.300 ft. From there the route descends towards the carrilet, the remains of an old wagon that transported materials through hydroelectric constructions at the beginning of the 20th century. We will finally arrive at the Colomina Refuge where we will spend the first night. Distance: 16km / 10 mi | Elevation gain/loss: 950m+/ 380m- // 3.100 ft+ / 1.250 ft- | Effective time: 6-7h