A few minutes before reaching the hidden pit where the Green Lagoon is hidden, red marks appear painted on the tree trunks and facilitate access. The stone milestones go down the slope of the hillside to a small flooded canyon and shortly after the beautiful fluvial niche of the lagoon appears surrounded by pine trees precious in size and shape. The place is a natural wonder on the mountainside, with hardly any environmental alterations except for the tracks of the mountaineers who reached the shore. The trail leaves the lagoon from the same place, goes up about fifty meters up the mountainside, leaves the path to the left and continues straight through the bottom of the trough. The ascent is hard due to the inclination of the slope, there is not a good layout of the path and although there are stone milestones it is difficult to run and orient yourself at the same time.