Mynydd Llwyn-gwern
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| Mynydd Llwyn-gwern | |
|---|---|
 The summit of Mynydd Llwyn-gwern with Mynydd Model beyond | |
| Highest point | |
| Elevation | 269.2 m (883 ft)[1] |
| Prominence | 30 m (98 ft)  |
| Naming | |
| Language of name | Welsh |
| Geography | |
 | |
| Location | Gwynedd, UK |
| Parent range | Cadair Idris |
| OS grid | SH 7650 0466 |
Mynydd Llwyn-gwern or Mynydd Llwyngwern is a mountain in southern Snowdonia, Wales. It lies above the Afon Dulas to the west and the Nant Ffrydlan to the east. The summit is noted for a series of low pillow mounds.[2]
The Llwyngwern slate quarry on the west flank of the mountain operated from the 1820s until about 1950.[3] In 1972, the quarry became the site for an experiment in green living.[4] This has now developed into the Centre for Alternative Technology which occupies much of the quarry site. The centre built a wind turbine on the summit of Mynydd Llwyn-gwern.[2]
It is one of the Dyfi hills.