| Etang de la Gruère | |
|---|---|
| Location | Canton of Jura |
| Lake type | artificial lake, bog |
| Basin countries | Switzerland |
| Max. length | 600 m |
| Max. depth | 4.5 m |
| Surface elevation | 998 m |
Etang de la Gruère is a small lake in the Jura range near Saignelégier, Canton of Jura, Switzerland. The lake and the surrounding bog is a nature preserve. The lake was formed in the 17th century, when a dam was built for a mill.