Mountains & hills · South Wales
Pen Twyn Mawr
In or near Longtown.
Pen Twyn Mawr — Named summit at 658 m.

Wikimedia Commons contributors — see linked file page for photographer and licence licence
Plan your visit
- Typical visit
- 3 h–8 h
- Best time of year
- Late spring – early autumn (May–Oct)
- Free entry
- Dog-friendly
About
Pen Twyn Mawr is a named summit in the United Kingdom. Wikidata describes it as: "Named summit at 658 m.". Coordinates: 51.9338°, -3.1037°.
Photo gallery
Protected designations
- Site of Special Scientific Interest: River Wye SSSI
Designations sourced from Natural England open data under OGL v3.
From the Wikipedia article
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.
Excerpt from Wikipedia under CC BY-SA 4.0. See the source article linked in Sources below.
- Coordinates
- 51.9338, -3.1037
- District
- Powys
- Parish
- The Vale of Grwyney
- Postcode
- NP7 7LY
- Parliamentary constituency
- Brecon, Radnor and Cwm Tawe
Sources
- osm: n3295144101 (ODbL)
- wikipedia: Pen Twyn Mawr (CC BY-SA 4.0)
- commons: Twynmawr.JPG (CC BY-SA 4.0)
Other places nearby

Twyn Du
Mountains & hills · 1.6 km

Pen Gwyllt Meirch
Mountains & hills · 1.9 km

Pen y Gader-fawr
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Pen y Gader Fawr
Vineyards · 2.4 km

Pen y Gadair Fawr
Natural landmarks · 2.4 km

Pen Y Gadair Fawr
Mountains & hills · 2.4 km

Vale of Grwyney
Historic churches · 2.4 km

Bal-Mawr
Mountains & hills · 2.6 km

Pen Twyn Glas
Mountains & hills · 3.1 km

Pen Twyn Glas
Mountains & hills · 3.1 km

Chwarel y Fan
Natural landmarks · 3.1 km

Chwarel y Fan
Mountains & hills · 3.1 km
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📷 3Frequently asked questions
- Where is Pen Twyn Mawr?
- Pen Twyn Mawr is in South Wales, United Kingdom (postcode NP7 7LY), in the parish of The Vale of Grwyney.
- What is Pen Twyn Mawr?
- Pen Twyn Mawr — Named summit at 658 m.
- How do I get to Pen Twyn Mawr?
- Drivers can use postcode NP7 7LY.
- Is Pen Twyn Mawr a protected site?
- Yes — Pen Twyn Mawr is part of the River Wye SSSI Site of Special Scientific Interest.
- Is Pen Twyn Mawr free to visit?
- Yes, Pen Twyn Mawr is free to enter.
- How do I get to Pen Twyn Mawr?
- Drivers can navigate to postcode NP7 7LY. It sits within the Brecon, Radnor and Cwm Tawe parliamentary constituency.