Brenta Dolomites - The access valleys and paths. Val di Jon: paths 349  and 348.
The Jon Valley winds from the south to the north between the slopes on the Monte Piz and Crona Vecchia peaks. The route begins from the bridge in Baesa. After crossing the River Ambiez the path begins to climb passing Masi di Jon, the Dos delle Fratte and Le Pezze peaks and the Malga Bassa Andogno (1,863 m.). It then goes to the west of the Cima Crona Vecchia peak and passes the Piaze and Balotoni delle Piaze peaks until it reaches the Malga Asbelz where it intersects path 348 which comes up from Seo. From here the itinerary is the same as the one described for the climb from Seo up to the Malga Valandro. 

After the Sella di Colmalta saddle, the Busa di Senaso hollow and the Prà del Vescovo meadow, those who wish to go down to the valley without passing the Al Cacciatore Refuge can turn right towards the well visible Malga di Senaso di Sopra (1,847 m.). From here an unnumbered path leads to path 325 and, going east, to the Malga di Senaso di Sotto lower down at 1,577 metres. From the Malga you can get to San Lorenzo in Banale by following path 325 or by taking path 342 which goes past Masi di Dengolo and then joins path 349 a little way above the bridge in Baesa.