The sun determines the extraordinary flora and fauna along the exposed Sun Trail (Sunnenweg) on the arid Monte Sole mountain in the holiday area of Castelbello/Kastelbell-Ciardes/Tschars in Venosta Valley. The trail extends from Laces/Latsch via Castelbello south to the Juval castle rock, and is accessible from spring until November. The hike requires good physical condition, a bit of perseverance and confident movement.

The circuit trail invites visitors to explore the extraordinary nature of the Monte Sole mountain in three stages – the Natur-Mythenweg trail, the Burgenweg trail and the Ortl-Steig path.