Pen Twyn Glas

Pen Twyn Glas is a summit in the Black Mountains located at 646 meters (2,119 feet) with a grassy peak marked by a stone cairn. The hill sits within a range containing several neighboring peaks and can be reached via multiple established walking routes.

The peak has served as a mapped reference point since the early days of Ordnance Survey charting and appears in geographical records across generations. Its location within the Black Mountains connects it to the broader landscape history of the Powys region.

The Welsh name reveals local heritage through its components: 'pen' means head or top, while 'twyn glas' translates to green knoll. This naming tradition shows how Welsh speakers have long described the landscape and its features.

Established walking paths approach the summit from several different starting points, with routes typically requiring between two and four hours of walking time. Route difficulty and length vary depending on your fitness level and choice of path.

The summit has a prominence of 21 meters, marking it as a connecting point between two higher neighboring peaks, Pen Allt-mawr and Mynydd Llysiau. This intermediate position makes it an interesting stop for walkers exploring the entire mountain group.

Location: Powys

Elevation above the sea: 646 m

GPS coordinates: 51.92454,-3.14585

Latest update: December 14, 2025 20:04