It's easy to follow, but it's not marked. Ideally you'd have a GPS (a phone would probably do for just making sure you're not too far off route).
This is my map of it: http://www.gpsies.com/map.do?fileId=tfgqqphfrfjnzuyl
Cool, thanks - I might just give that a go.
Have you been back to BikePark Wales at all?