The 10 mile (14.5 km) route runs from East Grinstead in West Sussex, through Forest Row just over the border into East Sussex, close to the River Medway in Ashdown Forest towards the Kent village of Groombridge in the east. The path runs along the route of the old East Grinstead to Tunbridge Wells railway. It forms part of National Cycle Route 21, linking up via East Grinstead town centre with the Worth Way to the west. The path passes through many villages, such as Hartfield, from which refreshments are provided in a local pub. Forest Row is a village, with shops and services. Bike hire and repair is also available at Forest Row via a community run project Forest Row Cycle Hire 
A greater deal of detailed information is available in the form of a PDF from East Sussex County Council; 
Have a well maintained bike and a puncture repair kit etc; since there are limited bike shops( one in Forest Row, Future Cycles) and at certain times of the day and at certain bits of the route traffic can be a bit sparse.