An impressive Iron Age hillfort and the remains of a brick and tile works on land owned by Brecon Beacons National Park Authority.

OS grid ref SO 029304 (summit)

The flat summit of the hill affords panoramic views across the Usk Valley taking in Brecon and the Brecon Beacons.  It offers a good vantage point to consider the fact that in times past, the Usk flowed through the valleys to the immediate north and south of the hill.  Though largely concealed beneath vegetation, the hill is composed of the sandstones and mudstones of the St Maughan’s Formation of the ‘Old Red Sandstone’.


  • Old Red Sandstone (Devonian); St Maughan’s Formation
  • Quaternary; abandoned river courses


  • OS Landranger 160, Explorer map OL12
  • Geological — BGS 1:50,000 ‘Brecon’


  • Geotrail leaflet


  • Free car park on western side at SO 028309
  • Entry: free


  • Open country; steepish ascent over uneven ground; 100m / 300’ ascent to hilltop, exposed to weather

Transport links

  • By car — by minor road from Brecon
  • By train — nearest stations at Llandovery, Merthyr Tydfil and Abergavenny – see Traveline Cymru
  • By bus — see Traveline Cymru; X43, 63, 714 services run to/from Brecon
  • By bike — NCN 8 runs through Brecon; bridleway runs across Pen-y-crug itself.

Other Geopark attractions nearby