Ynyscrug Castle, Trealaw

Has been described as a Possible Timber Castle (Motte)

There are cropmark/slight earthwork remains

NameYnyscrug Castle, Trealaw
Alternative NamesRhondda; Ynys y Crug; Hangman's Hill; Gibbet Hill; Tonypandy
Historic CountryGlamorgan
Modern AuthorityRhondda Cynon Taff
1974 AuthorityMid Glamorgan

A segment of mound, 31m N-S and 3.8-4.6m high, remains of a motte and bailey castle, with the motte being ditched and the bailey lying to the S along the river-plain scarp. (Coflein)

Over 5/6ths of Ynyscrug, a large circular mound about 100ft high, badly damaged C.1855 to make way for the railway. A sketch of the mound shows a motte & moat. (Glamorgan-Gwent Archaeological Trust HER)

Gatehouse Comments

Rest of castle lost under road and railway. Native welsh castle.

- Philip Davis

Not scheduled

Not Listed

The National Monument Record (Coflein) number(s)
County Historic Environment Record
OS Map Grid ReferenceSS994927
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  • Morgan, Gerald, 2008, Castles in Wales: A Handbook (Talybont: Y Lolfa Cyf.) p. 241 (listed)
  • < >RCAHMW, 1991, An Inventory of the Ancient Monuments in Glamorgan Vol. 3 Part 1a: The Early Castles (London: HMSO) < > MO11 p. 73-4
  • King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol. 1 p. 168
  • Morien, 1903, History of Pontypridd and Rhondda Valleys (Pontypridd) p. 29-30, 239-42


  • Spurgeon, Jack, 1987, 'The Castles of Glamorgan' Château Gaillard Vol. 13 p. 207
  • Thomas, H.J. and Clayton, D., 1986, ‘Ynys y Crug motte, Tonypandy’ Morgannwg Vol. 30 p. 74–5 online copy [online copy > http://welshjournals.llgc.org.uk/browse/viewobject/llgc-id:1173160/article/000042033]
  • Spurgeon, C.J. and Thomas H.J., 1980, 'Ynyscrug, Rhondda' Archaeology in Wales Vol. 20 p. 81-2
  • Hogg, A.H.A. and King, D.J.C., 1970, 'Castles in Wales and the Marches (Additions and corrections to lists published in 1963 and 1967)' Archaeologia Cambrensis Vol. 119 p. 119-124