The Harrow Way (also spelled as "Harroway") is another name for the "Old Way", an ancient trackway in the south of England, dated by archaeological finds to 600–450 BC, but probably in existence since the Stone Age.
A principal track also starting in the valley of the Great Stour from Canterbury, to lead along the North Downs or its southern slopes, through Maidstone and Guildford to Farnham, Surrey.
Winchester, apart from being an ecclesiastical centre in its own right (the shrine of St Swithin), was an important regional focus and an aggregation point for travellers arriving through the seaports on the south coast.
The western part of the Old Way, the Harrow Way, can be traced from Farnham, Surrey west through Basingstoke and Andover to Salisbury Plain and Stonehenge, Wiltshire, through Dorset and on to Seaton on the Devon coast.
At the Halstock end, a short length was realigned to form the access for a Roman villa (which was built on the site of a late Iron Age farmstead).