It is a classical itinerary allowing tourists to appreciate some of its most beautiful views and at the same time to discover the history of the valleys and its mines.
The trail (no. 320) leaves from the historical village of Troncea and follows the mule track used by the workmen to reach the galleries at Colle del Beth and, before the building of the cableway, to bring to the valley the chalcopyrite (mineral from which copper and sulphur derive). The mining activity was abandoned after the 1904 tragedy, when 81 miners died under an avalanche falling from the side of Mt. Ghinivert.
The trail, completed with cases illustrating the mining activity, crosses environments which well represent the naturalistic features of the Park by enabling the observation of several botanical species and, if you are lucky, of chamois, deer, roe deer, ibex, and wood grouse.
On Colle del Beth you can see the ruins of the ancient camps used by miners and, near the entrance of the mines, the wonderful lakes of glacial origin called "laghi del Beth"; moreover, the Park has built a bivouac used as a surveillance hut, which can also be used by the hikers if they book in advance at the Park Authority Offices.