Clay Pit Hill is the highest hill in Chitterne parish at 178 metres. It lies south of the village between Chitterne and Codford and from the top you can see the hills beyond the Wylye Valley. The hill is named for the place where clay was dug in the 17th century and carted to Amesbury to be made into clay tobacco pipes. More about this here: Clay Pits
There are two public paths to reach Clay Pit Hill from the village: via a bridleway off Shrewton Hill and via the old Warminster to Sarum road at the top of Shrewton Hill. Both of these eventually join in with the old cart track between Maddington (Shrewton) and Codford that forms the southern part of the Chitterne Parish boundary.

The bridleway starts from the B390 to Shrewton, just outside the 30 mph limit, and cuts south across a field. Usually the path is cleared by the farmer if a crop is being grown, but when I walked it recently the path was unmarked.

Set off across the field heading toward the left end of a line of trees and come to the first bend of the bridleway dog leg, a left then a right.

At the line of trees the bridleway turns left and becomes a well-defined gravel track for some way before taking a right turn. Follow the bends of the track until you see a finger post on your left marking Codfod Drove.

The track bears right but in fact you are leaving the bridleway and joining Codford Drove.

The Codford Drove marks the boundary between Codford Parish on your left and Chitterne Parish on your right. Before you get to Clay Pit Clump you will come across the trig point on the right of the track.

I carried on from the trig point toward Clay Pit Clump. This patch of trees covers the old clay pits and is private land. If you wish to see the clay pits you will need the permission of the farmer at East Farm, Codford.

Turn left at Clay Pit Clump and you are entering Codford Parish. Straight on follows the parish boundary and takes you across fields in Codford parish to emerge eventually on the Codford Road. I turned around at this point and retraced my steps.
The other way to get to Clay Pit Hill starts at the top of Shrewton Hill almost opposite the water tower, where the old Warminster to Sarum road heads off toward Yarnbury Castle. Follow this track for several hundred metres until you reach a finger post on your right. This point is known as Oram’s Grave. It marks a junction of two parish boundaries, between Chitterne, Maddington and Codford. In the old days suicides were buried where the parish boundaries met in order to confuse the spirits of the dead. More about Oram here: Oram’s Grave

If you head from here toward Clay Pit Hill on Codford Drove you will eventually come to the same junction with the bridleway that I mentioned earlier, and so to the top of Clay Pit Hill. This track is most probably the track taken by the carters who carted the clay from the clay pits to Amesbury.