Carreg Cadno

Copyright: Simon Charlesworth. Original at Megalithic Portal.

A probable single stone row measuring 18.5m long, including seven large-sized boulders situated on a south facing millstone grit pavement. The row is orientated NNE to SSW and some of the stones have been propped in position indicating that this is an artificial construction. A stone row seems the most likely explanation and there are at least two other stone rows and a cairn in the vicinity.


Wales     Powys     Brecon Beacons     SN 8767 1569     Lat 51.828496   Long -3.631444

Map showing the location of Carreg Cadno stone row.


Type: Single Length: 18.5m
No. of stones: 7 Size of stones: Only large
Orientation: 19° Altitude: 490m
Upper end: – Lower end: –
Straight (Yes or No)  : ? Sea View: Yes
Context:  –
Notes: Boulder alignment. This alignment was discovered by Simon Charlesworth who kindly showed me around.

Other Information

Public Access:  Yes
Land Status: National Park
Scheduled Ancient Monument:


Category: Possible.  It is always difficult to establish whether a line of boulders were deliberately placed or are instead the result of glacial or periglacial activity. Generally there must be a presumption in favour of natural origin, but occasionally some detail may hint at the possibility of human intervention. At Carreg Cadno a number of the boulders have been propped into position indicating that this site has been deliberately fashioned. What is less clear is whether this happened in prehistoric times. On balance the possibility of this feature being a form of prehistoric stone row remains the most likely explanation.


This stone row is of Type S2. Information on this form of stone row and other rows of this type is available here.


View from the north looking along the boulder alignment (Scale 1m).

View from the south looking along the boulder alignment.

View from the south east (Scale 1m).

Access Information

Car parking is available at SN 85567 15530. From here walk north east along the waymarked path to SN 86957 16141. Head south east up the hill for about 850m.

Online Resources 

Megalithic Portal     Coflein     Archwilio     Secret Stones of Wales


VISITED:- 19th March 2016

FIRST PUBLISHED:- 27th January 2016

LAST UPDATED 15th March 2019

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