Mynydd Illtud and Traeth Mawr

Covid-19 advice

All areas of countryside within the Geopark are now open again. Please follow guidelines to stay safe. Be aware that you may not be able to enjoy the usual range of facilities in town, villages and at centres. Further advice on enjoying the Geopark safely.

The NPVC/Mountain Centre car park is currently open daily between 10am and 4pm. Parking charges are currently set aside. Visitor information is available at an outdoor stall but the centre itself, including the shop, is closed. The tearooms are operating an outdoor service only. The toilets are open.

The National Park Visitor Centre above Libanus village is the start for various walks across Mynydd Illtud including a Geotrail over the common passing through Traeth Mawr nature reserve.

OS grid ref SN 978264 (National Park Visitor Centre/’Mountain Centre’)

Mynydd Illtud is an extensive stretch of undulating common land owned and managed by Brecon Beacons National Park Authority.  Sheep graze the pasture developed on thin soils which overlie rocks of the St Maughan’s Formation of the Old Red Sandstone.

An Iron Age hillfort is perched atop Twyn y Gaer at the north end of the common.  Pillow mounds adorn its slopes.  There are panoramic views over the Usk Valley to the north whilst the Brecon Beacons form a spectacular backdrop to the south.

Traeth Mawr and Traeth Bach are important wetland wildlife habitats and their peat deposits contain a valuable record of the climate of south Wales since the Ice Age.


  • Old Red Sandstone (Devonian); St Maughan’s Formation
  • Quaternary; moraines, ice-scoured plateau, peat deposits


  • OS Landranger 160, Explorer map OL12
  • Geological — BGS 1:50,000 sheet: 213 ‘Brecon’


  • Geotrail leaflet
  • Geotour – download the app to your smartphone for free from the Google Play or the App Store (search ‘Geotours’) *NEW for 2021! More information


  • Restaurant, shop, toilets, displays, picnicking
  • Pay & display car park at SN 978264
  • Entry: free


  • Common land; largely level; barrier-free but uneven surfaces;

Transport links

  • By car — by minor road from A470 at Libanus
  • By train — nearest stations are at Llandovery, Merthyr Tydfil and Abergavenny — see Traveline Cymru
  • By bus — see Traveline Cymru; X43 service stops at Libanus (1.5 miles)
  • By bike — can be reached by various minor roads, byways and bridleways

Other Geopark attractions nearby