Piz Sena, Mountain summit in Grisons, Switzerland

Piz Sena, also called Vetta Sperella, is a mountain of the Livigno Alps on the Italy–Switzerland border. Its western flank rises above Poschiavo in the Swiss canton of Grisons, while the Italian side falls in Lombardy. The summit stands at 3,075 metres.

The mountain has long served as a natural boundary marker between Swiss and Italian territories, shaping trade routes across the Alps over centuries. Its position reinforced regional divisions and influenced how mountain communities on both sides developed separately.

The mountain's Italian name, Vetta Sperella, is used on the Lombard side, while German- and Romansh-speaking communities of the Poschiavo valley know it as Piz Sena. The two names sit on either side of the border ridge, so maps and signposts change language as you cross from Valgrosina into Val Poschiavo.

Check weather conditions before attempting the ascent, as visibility and temperature can shift rapidly and create hazardous conditions at this elevation. The best time to climb is late summer through early autumn when snow cover is minimal and routes are more clearly visible.

The mountain acts as a watershed divide between Italy's Valgrosina Valley and Switzerland's Val Poschiavo, creating distinct ecological zones on each side. This separation results in different plant and animal patterns that visitors can observe as they cross between the two regions.