| Pen Twyn Mawr | |
|---|---|
Pen y Gadair Fawr from the summit of Pen Twyn Mawr |
|
| Elevation | 658 m (2,159 ft) |
| Parent peak | Pen y Gadair Fawr |
| Listing | Nuttall |
| Location | |
| Location | Black Mountains, South Wales |
| Topo map | OS Landranger 161 |
| OS grid | SO215300 |
Pen Twyn Mawr is a top of Pen y Gadair Fawr in the Black Mountains in south-eastern Wales. It lies on one of the many south ridges of Waun Fach.
The summit is marked by a pile of stones in an area of sandy soil and heather. Pen y Gadair Fawr is to the north, Chwarel y Fan to the east and Pen Allt-mawr to the west.[1]