Lago di Loppio is a lake in Trentino, Italy.

The lake has been drained due to the construction of the Mori-Torbole Tunnel in 1954. Occasionally, it fills up with water for a short time when hit by heavy rain.

The lake basin is now a wetland that constitutes a specific ecosystem hosting a peculiar flora and fauna. For that reason, the Autonomous Province of Trento declared this area as a protected biotope.