From Monmouth take the B4233 through Rockfield. Keep on the road until you drive through The Hendre and then take the first left immediately after the entrance to the golf club. You will then shortly come to a fork in the road with a passing place – park here. You are now parked immediately next to the Barrow; the other side of the hedge.
This is a fairly large Barrow and easy to spot.
I didn’t bother to battle my way through the hedge as there seemed little point.
Not really worth the effort of visiting unless you happened to be in the area.