All the mapping you need to walk the Ridgeway National Trail an 87-mile (139km) route through southern England from Avebury in Wiltshire to Ivinghoe Beacon in Buckinghamshire. Following a ridge of chalk hills through the Chiltern Hills AONB & North Wessex Downs AONB, the Ridgeway is usually completed over 6-8 days & can be walked all year round. ? This booklet of Ordnance Survey 1:25, 000 Explorer maps shows the full line of the National Trail, along with the relevant extract from the OS Explorer map legend. It can be used when walking the trail in either direction, & is just the right size for slipping into a jacket pocket or top of a rucksack.