This hike leads in a short time to the Baste Lake and to the Mondeval plateau. Starting from the Giau Pass, follow path no. 436 of Alta Via no. 1. The path is initially flat and passes through the upper Val di Zonia where, if you are lucky, you may catch a glimpse of the chamois that graze along the crests of Monte Cernera. Once you have passed Forcella Col Piombin (2239 m), the path descends along some easy rocks and from there climbs more steeply up to Forcella Passo Giau (2360 m). From Forcella you can admire a spectacular view of the Tofane and 5 Torri. In front of us the plateau of Mondeval de Sora stands out and we can immediately catch a glimpse of Lago delle Baste, which can be reached by following the path on the right or passing through the high mountain pastures. Once you have passed some large boulders detached from the Lastoi del Formin called "La Città di Sassi" you arrive at the small lake. The silence and atmosphere of this place will enchant you and a photo of the Pelmo reflected in the lake is a must. Once you have passed the lake you can descend to the Mesolithic burial site of the Mondeval man and from there climb up to route 436. For the more experienced you can reach Forcella Ambrizola and descend to Rifugio Croda da Lago or Rifugio Città di Fiume. The return journey is along the same path as the outward journey.
