| Delio Lake | |
|---|---|
 | |
  Delio Lake Location within Lombardy | |
| Location | Province of Varese, Lombardy |
| Coordinates | 46°04′42″N 8°45′19″E / 46.078262°N 8.755288°E |
| Basin countries | Italy |
Surface area | 30 ha (74 acres) |
Surface elevation | 930 m (3,050 ft) |
Delio Lake is a lake in the Province of Varese, Lombardy, Italy. At an elevation of 930 m, its surface area is about 30 ha (74 acres). It is a natural lake, but its shape has been altered by its use for energy production. It serves as the upper reservoir for the pumped-storage Roncovalgrande Hydroelectric Plant.
In 2020 a hiker died after being caught in fast flowing water that escaped the banks of Lake Delio.
