It keeps close to the border as far as practical, often running along it.

It was developed as a walking route in celebration of the county for the Association of British Counties.

[1] The route is a circular route with a starting and finishing point at Chorleywood Station.

It is 171 miles long (currently longer due to a diversion for the HS2 works).

It incorporates sections of a number of waymarked routes, including the Chiltern Way, Hertfordshire Way, Icknield Way Trail and Hertfordshire Chain Walk, along with many local paths.