| Elter Water | |
|---|---|
 Elter Water with the Langdale Pikes in the background | |
  Elter Water Location in the Lake District National Park  Elter Water Location in South Lakeland, Cumbria | |
| Location | Lake District, Cumbria |
| Coordinates | 54°25′39″N 3°01′33″W / 54.427469°N 3.025875°W |
| Type | Tarn |
| Primary inflows | River Brathay, Langdale Beck |
| Primary outflows | River Brathay |
| Basin countries | United Kingdom |
| Max. length | 1,030 yd (940 m) |
| Max. width | 350 yd (320 m) |
| Surface area | 0.06 sq mi (0.16 km2) |
| Max. depth | 20 ft (6.1 m) |
| Shore length1 | 2.9 km (1.8 mi) |
| Surface elevation | 187 ft (57 m) |
| Islands | 2 |
| 1 Shore length is not a well-defined measure. | |
Elter Water is a small lake in the Lake District in North West England, half a mile southeast of the village of the same name. It has a length of 0.62 miles (1.00 km), maximum width of approximately 0.24 miles (0.39 km), a maximum depth of 7 metres (7.7 yd), and an area of 0.16 square kilometres (0.062 sq mi). Its outflow is the River Brathay, which flows south to join Windermere near Ambleside.[1] Windermere is itself drained by the River Leven, which flows into Morecambe Bay. The lake is in the unitary authority of Westmorland and Furness and the ceremonial county of Cumbria.
Elter Water forms part of the boundary between the historic counties of Lancashire and Westmorland, and is the northernmost point of the former.