Offa's Dyke Map Booklet: 1:25,000 OS Route MappingAll the mapping you need to walk the Offa's Dyke Path National Trail that runs for 177 miles along the English Welsh border between Sedbury (near Chepstow) and Prestatyn on the north Wales Coast. NOTE An accompanying Cicerone guidebook Offa's Dyke Path describes the full route from south to north with lots of other practical and historical information. The accompanying guidebook INCLUDES a copy of this map booklet. This booklet of Ordnance Survey 1: