| Ffynnon Lloer | |
| Type: | natural |
| Basin Countries: | United Kingdom |
| Area: | 6acres |
| Pushpin Map: | Wales |
| Pushpin Map Alt: | Location in Wales |
Ffynnon Lloer (Welsh : Source of [the] Moon) is a lake in the Carneddau range of mountains in Snowdonia, North Wales. It lies below the peaks of Pen yr Ole Wen and Carnedd Dafydd at a height of 2225feet and covers an area of some 62NaN2.
The remains of two wartime aircraft, which crashed in 1942 and 1943, lie on the slopes round the lake.[1]
Afon Lloer, its outflow, flows into Llyn Ogwen.