| Lac d'Ilay Lac de la Motte | |
| Location: | Jura department, Franche-Comté |
| Coords: | 46.6261°N 5.8975°W |
| Pushpin Map: | France Franche-Comté |
| Basin Countries: | France |
| Length: | 1.9km (01.2miles) |
| Width: | 0.4km (00.2miles) |
| Area: | 72ha |
| Depth: | 10.3m (33.8feet) |
| Max-Depth: | 32m (105feet) |
| Elevation: | 774m (2,539feet) |
| Islands: | 1 (Île de la Motte) |
The Lac d'Ilay (or Lac de la Motte) is a lake in the Jura department of France. It has a surface area of 0.72 km² (180 acres). It is located in the communes of Le Frasnois and La Chaux-du-Dombief.[1]