Pen Twyn Glas

Pen Twyn Glas
Pen Twyn Glas, Mynydd Llysiau and Waun Fach from Pen Allt-mawr
Highest point
Elevation646 m (2,119 ft)
Prominence21 m (69 ft)
Parent peakPen Allt-mawr
Listingsub Hewitt, Nuttall
Naming
Language of nameWelsh
Geography
LocationBlack Mountains, South Wales
OS gridSO215300
Topo mapOS Landranger 161

Pen Twyn Glas is a top of Pen Allt-mawr in the Black Mountains in south-eastern Wales. It lies in between Pen Allt-mawr and Mynydd Llysiau.

The summit is merely a grassy bump on the ridge marked by a pile of stones.