The route dates back to the 6th century. It follos the path of Saints Seiriol Wyn and Cybi Felyn who would walk from the opposite ends of Ynys Môn and meet at Ffynnon Cybi in Clorach. The route starts at Caergybi and ends at Trwyn Du, Penmon using mainly back roads with public footpaths where possible and a short section of the coastal path. 

The bicycle and footpath in Jyske Ås starts from Dronninglund Castle and ends at the square in Østervrå. The route was previously part of the Hærvejs route, but this has now been given a different course, so the Jyske Ås path is easily missed due to messing signs in certain places. However, the route can easily be found and is definitely worth a visit.

A run comprising of running from the Army Camp at Sennybridge and circumnavigating the whole danger area that they fire on which is Mynydd Epynt Mountain. The route is circular and open to public. It is a serious undertaking and has over 5000ft of elevation. The route starts and finishes at the Army Camp entrance.