Coniston Water is the third largest lake in the Lake District.
It is 5 miles (8 km) long, half a mile (800 m) wide, has a maximum depth of 184 feet (56 m).
It covers an area of 1.89 square miles (4.9 km2) and drains to the sea via the River Crake.
Coniston Water is an example of a ribbon lake formed by glaciation.
The lake sits in a deep U-shaped valley scoured by a glacier in the surrounding volcanic and limestone rocks during the last ice age.
To the north-west of the lake rises the Old Man of Coniston, the highest fell in the Coniston Fells group.
Reference: Wikipedia