General data
- Name:
- Water system: Adige
- Water type: River
- Progression: Arione River -> Adige -> Adriatic Sea -> Mediterranean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Subtropical, Temperate
- Continents: Europe
- Countries: Italy
Lago di Cei (Lach de Zéi in local dialect), is a lake in the comune of Villa Lagarina, not far from Rovereto in Trentino, northern Italy. The whole basin in which the lake lies was once occupied by a single, larger lake. After the latter drained, two smaller lakes remained: the largest, having a surface of c. 4.5 hectares, receives the water of the other (called Lagabis), which has a semicircular shape a from which the Rio Arione outflows.