Pera Grossa

Pera Grossa is a glacial erratic in the morainic landscape between Rosta and Reano that rises about 10 meters above ground. The boulder displays the typical features of rock transported by ancient glaciers over considerable distances.

During the late Ice Age, this massive boulder was torn from its original bedrock and transported across the valley by glacier movements. Its deposition reveals how glaciation shaped this region of Piedmont.

The stone formation belongs to the Geopark of Alpine Cozie region, contributing to the geological understanding of glacial movements in Northern Italy.

The erratic is reachable through several marked hiking trails and cycling routes within the morainic landscape, which suit different fitness levels. Visitors should wear sturdy footwear and bring water, especially on warmer days.

The boulder stands among numerous other erratics in the area, forming part of a 50-square-kilometer geological complex shaped by ancient glacier activities.

Location: Piedmont

Part of: Anfiteatro morenico di Rivoli-Avigliana

GPS coordinates: 45.06100,7.45900

Latest update: December 14, 2025 18:42