source: https://www.alltrails.com/en-gb/trail/switzerland/valais/tortin-ancien-bisse-de-cherve

Head out on this 12.7-km circular trail near Siviez, Valais. Generally considered a moderately challenging route, it takes an average of 4 h 47 min to complete. This trail is great for birding and hiking, and it’s unlikely you’ll encounter many other people while exploring. The best times to visit this trail are May through September. Dogs are welcome and may be off-lead in some areas.

The tour starts in Tortin and then continues straight along the small stream and then through the Foret de Combatseline and on to La Tsa and through the Ancien Bisse de Cherve area through nature. You arrive at Chervé at 2261 m and then descend through the forest back to the start. This trail can be a little muddy after a few days of bad weather.