Monte Cornagera, Mountain summit in Lombardy, Italy

Monte Cornagera is a 1,312 m pyramid-shaped mountain of the Bergamasque Prealps in the Seriana Valley, entirely within the municipality of Aviatico. Its dolomite rock was fractured over millennia by the slow westward movement of the central mass, producing the rock walls and towers visible today, with scree slopes around the base.

The mountain's Latin name, Ruina, referred to the debris and broken stone at its base. Local dialect later combined corna (pointed rock) and gera (gravel) into the current name. In 999 part of Aviatico's population sheltered in its caves and crevices, fearing the millenarian end of the world. In 1630 others fled there from the plague raging in nearby villages; human remains found on the mountain are dated to that period.

The name comes from the local dialect: corna (pointed rock) and gera (gravel), after the Latin Ruina, for the debris at its base. Two towers are named for the Longo brothers, Giuseppe and Innocente, and for Ilario Garlini, climbers formed on these walls; Leone Pellicioli brought his students here.

The south-facing rock walls and towers are the mountain's climbing area, with routes from grade II to V; climbers have used them since the early 20th century. The whole mountain lies within Aviatico municipality, and the summit is reached on foot, with the pyramid top giving views over the Seriana valley and the Orobie Alps.

The Latin name Ruina, recorded for the mountain, referred to the mass of loose debris and broken stone around its base. The present name comes from local dialect: corna, pointed rock, and gera, gravel, describing the sharp crags and the scree slopes that ring the mountain.