These Welsh peaks are categorised by means of the following hill lists. Note that any one peak may ‘qualify’ for inclusion in several lists.
- Hewitts are hills in England, Wales or Ireland over two thousand feet (610 m) high with a relative height of at least 30 m. The list was compiled and is maintained by Alan Dawson.
- Marilyns are hills in the British Isles that have a relative height of at least 150 m (492 feet), regardless of distance, absolute height or merit. There are currently 1,551 Marilyns in Britain: 1,213 in Scotland, 178 in England, 156 in Wales and 5 on the Isle of Man (Black Mountain is in both England and Wales). There are a further 453 Marilyns in Ireland. The list was compiled and is maintained by Alan Dawson.