There is a layby to park in.Walk 50 yds towards Castallack,there is a gate on the left and the stone is about 20yds into the field. A fine stone 4ft high with a very regular line of 7 "cup" markings on the lower half.
SW454255 - Stands in a field close to the minor road from Castallack to Sheffield. This 1.55m tall menhir is apparently notable for a line of 7 cupmarks, with 2 more below that. Not marked on the OS map.
I found this after looking at the "cupmarked"stone.On the way back to the car I saw through the next field gate this fallen stone,so I went to have a look and take a photo.The field had just been manured,thats what is on the top of the stone.There is nothing marked on the OS map so when I got home I looked in the Old Maps.There was nothing in that field but there was one marked in the field just south,not there now,this may be that stone felled and dragged for what reason who knows.