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 is also available at Forest Row .
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.
A colourful Milepost on the Forest Way
By car - parking is present in Forest Row, Hartfield and semi on-road parking is at Groombridge
Ashurst Station (on the 'Uckfield Line' from London) is nearby (but is the other side of a hill and not signposted
Eridge Station (next one down) is signposted to the path and both Forest Row and Groombridge, this part of the route is on (fairly rural roads)
East Grinstead Station, also from London - the path is signposted from East Grinstead and both the station and the town are around 2.5 miles (mostly uphill) from Forest Row
By bus - route 291 passes parallel to the path  with routes 270 and Countryliner 261 passing through Forest Row Very few (if any) bikes are allowed on buses, horses similarly are excluded
Eat and Drink
After all that exercise you'll likely want some food...
Forest Row Various restaurants and pubs, two supermarkets and a good deal of cafes
Hartfield just under half way; plenty of food places, also the home of pooh bear
Anchor Inn, Church Street, tel: 01892 770 424 - bar meals and snacks
Gallipot Inn, Gallipot Street, tel: 01892 770 268 - bar meals and snacks
Haywaggon Inn, High Street, tel: 01892 770 252 - restaurant
The Crown The Green, Groombridge tel: 01892 864742
The Junction Inn Station Road, Groombridge Tel: 01892 864275
Please be aware that too much alcohol and bikes don't always mix
The path is suitable for walkers and horse riders too, but it is recommended that you follow the following points:
cyclists should give way to walkers, horses and people with disabilities. Please use a bell but be aware that people may not hear or see you.
horse riders – no galloping please
take care crossing nearby roads
keep a reasonable speed, and slow down at junctions and bends.