Castle Rock is a spectacular outcrop of a lode on surface forming a prominent monadnock type feature. Trials and shaft are visible near the rock which marks the western boundary of the Dyfngwm sett. Beyond, the lode splits into a north branch heading towards Esgairgaled and a south branch heading towards Dyfngwm and Pen Dylife, with extensive trials along its length.
Publications (11)
- Bick, D.E. (1991); Old Metal Mines of Mid-Wales, The; West Montgomeryshire, Aberdovey, Dinas Mawddwy & Llangynog - Part 4; pp. 14-15
- Chapman, N.A.; NMRS (2007); British Mining 81 - Van Mines, The; ISBN 901450 6 18; pp.41.
- Edited by D. J. Linton (2009); Welsh Mines & Mining - The Lode of History; 122 pages
- Foster-Smith, J.R.; NMRS (1978); British Mining 10 - Mines of Montgomery & Radnorshire; ISBN 0 901450 12 X; pp.17-9.
- Hall, G.W. (2014); Welsh Mines & Mining - Metal Mining in Mid Wales 1822-1921; 131 pages
- Jones, Nigel and Walters, Mark and Frost, Pat (2004); Mountains and Orefields; 208 pages
- NMRS; British Mining 19 - Memoirs 1980-1982; pp.49.
- NMRS; British Mining 37 - Memoirs 1988; pp.27,45.
- NMRS; British Mining 80 - Memoirs 2006; pp.65.
- NMRS; British Mining 88 - Memoirs 2009; pp.72-98.
- NMRS; British Mining 90 - Memoirs 2010 - 50 Years of Mining History; pp.106,118-119.
