Lago del Corlo, Artificial lake in Arsiè, Italy.

Lago del Corlo is an artificial reservoir entirely within the comune of Arsiè, formed by a dam on the Cismon torrent. It has an elongated shape, beginning downstream of Giaroni di Fonzaso; after the village of Rocca on the right bank it narrows and is crossed by two bridges. Its maximum depth is 68 metres and its surface area is 2.45 km².

The dam was constructed in 1954, which caused several small settlements to flood and forced about two thousand five hundred people to leave their homes. This event permanently changed the geography and life of people in this valley.

The lake takes its name from Corlo, a small hamlet beside the dam. The villages of Carazzagno, Forcelletti, Zanetti and Corlo on the left bank of the Cismon stayed above the water, while Rocca on the right bank was partly flooded and only its old parish bell tower was kept.

The lake lies entirely within the comune of Arsiè, in the Feltrino area of the province of Belluno, and is crossed by two bridges after the hamlet of Rocca on the right bank. Water levels vary considerably, so shoreline access changes through the year. The dam is a double-arch structure 68 m high above the downstream riverbed.

The lake is crossed by two bridges, not three, and no suspended bridge spans it. The bell tower that survived is that of Rocca's old parish church, kept standing when the village was partly flooded; the hamlets of Giuliat, Carrer, Caballau and Chiesa disappeared under the water.