You will need an O/S map to find this site although once you do, access to the stones is easy.
Firstly I have to say that this is a lovely part of the world and well worth visiting – on a nice day of course!
Anyway, down to business: Park at the entrance to Cwm Garw farm and walk across the cattle grid, down the track towards the farm buildings. The stones are soon seen down the hill towards the left. Do not be tempted to head across the field straight to the stones as the ground is very waterlogged, despite appearing dry. Instead, stay on the track until it curves round and comes closest to the stones (10 minute walk). You will see 'paths' through the grass where people have walked over to the stones. This was relatively dry although still squelchy.
Both stones are about 7ft tall – one fat, the other quite thin. The stones seemed to align with the highest point of the mountains to the north.
A farmer was on his tractor in a nearby field, busy with his work. I was not challenged and it looked as though this site had quite a few visitors although there was no one else there when I visited. Well worth a visit when in this fairly remote area.
As Merrick says, the field is very boggy and I was there on a dry day. Makes sense when you look at the map - 4 springs converge in the area. The image taken from the road shows its just a hop, skip and a jump to the stones. It is, but wear wellies and watch out for some seriously spiky foliage...
One of the stones has amazing orange lichen unlike any I've seen before.
Standing on boggy land at the foot of the basin of mountains you see when looking north-west from Gors Fawr, Cerrig Meibion Arthur is two tall stones barely 6ft apart on an east-west axis. One 6 and a half ft high, only 1ft thick and two and a half feet broad, the other the same depth, marginally taller but much fatter.
Both stones have deep puddles of water at the base, more so with the thin stone, which is now leaning over.
There's probably a sight line on Glynaeron 1 & 2 standing stones if they weren't buried in hedges. Didn't check it out due to the furious drenching we've received thanks to being here during Pembrokeshire's monsoon season. Droplets of rain jumping several inches back out of the puddles as we huddled behind the stones!
The house in the middle is called Glynsaithmaen – 'glen of seven stones'.
In his book Mysterious Wales, Chris Barber tells the following Arthurian legend about the stones:
These stones, about 25 feet apart, are said to be a monument to King Arthur's sons who were killed by the Twrch Trwyth, a wild boar which caused havoc in his camp. It had originally swum over from Ireland. The story is told in great detail in the Mabingion. On the ridge above are Cerrig Marchogion - the stones of Arthur's Knights.
Presumably Cerrig Marchogion is Bedd Arthur, but I've not seen it referred to by this name before.