Start at Nant-y-Coy Mill on the A40 about 5 miles from Haverfordwest heading toward Fishguard.
The mill is on the main road sells teas and has a gallery attached.
1.
On the left of the mill there is a steepish lane with a sign CLUN-SELIN.
Walk up the lane for 50 yards to a footpath sign on the left (by "END OF PUBLIC ROAD" sign).
2.
Walk onto this footpath through bracken for 20 yards to where the path divides by a waymarker post.
3.
Take the left path for 50 yards to the next waymarker post.
(Here we turn left to take a short but worthwhile diversion to a viewing point looking across Treffgarne Gorge) 4.
Walk along this track for 100yards to a large rock cairn where there are wonderful panoramic views through 360 degrees of the gorge and various outcrops and granite rock formations.
5.
Retrace your steps to the last waymarker post then turn left.
6.
Continue left for about 500 yards, through one metal gate.
At the second metal gate enter a field.
7.
Cross this field ahead towards a mobile phone mast.
8.
At the mast, take the farm track to the right of the mast through Mount Pleasant Farm.
Follow the concrete farm track.
At the end of this, turn right for 300 yards to join a tarmac road into Treffgarne.
At this junction there is a small chapel on your left.
9.
Now walk downhill for 500 yards to meet the main A40.
Turn right, crossing the bridge and on for 100 yards to a sign to Spittal, turn left toward Spittal.
10.
You enter a disused railway tunnel and as soon as you exit this tunnel take the left hand fork along a wooded lane.
11.
After 300 yards you reach a sign MILLBROOK (by a bridleway and footpath waymarker).
Go left past this for 30 yards to another footpath waymarker post by a cottage.
12.
Here, go right up a steepish track, over a stream and on for 300 yards.
You reach the gates to Hazel Cottage where you turn left through a kissing gate.
13.
After 50 yards you come to a waymarker post where you keep directly ahead on a path through woods for 300 yards to a stile.
14.
Cross the stile into a conifer wood then over a small brook into mixed woodland for 300 yards till you come to a waymarker.
15.
Go right at this waymarker for 30 yards to another waymarker post.
16.
AT this waymarker post turn right steeply uphill for 200 yards to a T junction, here you turn left going slightly uphill for 150 yards to a stile then immediately a small stream.
17.
Cross this and turn downhill through a grassy clearing for 50 yards to cross a dry stream bed then walk 20 yards uphill to a stile.
18.
Cross this stile into a conifer plantation, keep ahead through conifer plantation into a dense conifer wood.
19.
Walk 500 yards through this wood sloping downhill over a carpet of pine needles toward the railway line until you come to a stile.
20.
Cross the stile then 50 yards to a bridge under the railway, then walk 75 yards to a footbridge over a river then uphill to re-join the A40 road.
21.
Look left and you will see The Nant-y-Coy Mill clearly visible about 300 yards, the point at which you started this walk.