Audax UK National 400
The National 400 was originally devised by the Cyclists' Touring Club (CTC) in 1983 and was organised by them until 2005. Audax UK revived this popular event in 2012. The National 400 is intended as a gentler introduction to the longer distances with evenly spaced controls, usually manned by volunteers, providing food and drink. There is also normally one or more controls where there have been some sleeping arrangements made if you want a few hours sleep. The route is also designed to be relatively simple to navigate and not be of a too demanding nature.