Key facts
Pen Twyn Glas (646m) is in Wales, in the Black Mountain.
- Region
- Wales
- Mountain range
- Black Mountain
- Prominence
- 20m
- Nearest higher peak
- Pen Allt-mawr · 720m, 1.5km
- Nearest hut
- Grwyne Fawr · 5.7km
- Lakes nearby
- Grwyne Fawr Reservoir (5.1km)
- Nearest village
- Cwmdu · 3.8km
