The AVON is a river in England that runs through the counties of Wiltshire, Gloucestershire, and Warwickshire. It is the second longest river in England and is a tributary of the River Severn. The source of the AVON is near Naseby in Northamptonshire and it flows for a total of about 220 miles before joining the Severn Estuary. The AVON is an important waterway for navigation and is also used for recreational activities such as fishing and boating.