Alpe Toso Bivouac at 1.649 m. is not in the area of Biella but in one of the Sesia valleys, Val Sorba.
Still, it represents a good base for some classical several days-journeys like the Prato ring-route which takes you from Montesinaro to the Croso pass, then Toso Alp, Loo pass, Mologna pass ending at Rivetti Hut and then downhill towards Piedicavallo or Montesinaro.
It is owned by C.A.I. Varallo section, it is always open but not managed. It has two rooms: a kitchen and a dorm which host twelve people.
Start: Montesinaro, Piedicavallo hamlet
Access time: 2 hrs 30′
Cartography: Carta dei Sentieri – Biellese Nord-Occidentale