The Ridgeway follows one of the oldest 'green roads' in Europe. It runs for 87 miles (140 km) from Overton Hill in the west across the Marlborough Downs & the Vale of the White Horse to Ivinghoe Beacon on the northern edge of the Chilterns. This is the complete official guide for the long-distance walker or the weekend stroller. All you need is this one book. Anthony Burton's official guide has been fully revised & updated for 2013 & this new edition has been completely redesigned with more & bigger photographs & much new background history & information. National Trail Guides are the official guidebooks to the fifteen National Trails in England & Wales & are published in association with Natural England the official body charged with developing & maintaining the Trails.