Hornsea Mere
| Hornsea Mere | |
|---|---|
Swan Island, Hornsea Mere | |
| Location | Southgate, Hornsea, East Riding of Yorkshire |
| Coordinates | 53°54′20″N 0°11′10″W / 53.90556°N 0.18611°W |
| Basin countries | United Kingdom |
| Max. length | 2 miles (3.2 km) |
| Max. width | 0.75 miles (1.2 km) |
| Surface area | 467 acres (1.89 km2) |
| Max. depth | 12 feet (3.7 m) |
| Surface elevation | 26 feet (8 m) |
Hornsea Mere is the largest freshwater lake in Yorkshire, England, and lies to the west of Hornsea in the East Riding of Yorkshire. The mere was used as a base for the Royal Naval Air Service and then latterly, the Royal Air Force during the First World War.