The Celtic Trail is a dedicated cycle network that covers east, south and west Wales. The 360 mile, largely traffic-free route encompasses some of the country’s most diverse scenery taking in Wales’ eastern gateway across to the Pembrokeshire National Park and through the best cycling routes in the UK.
The Celtic Trail is a must for the cycle enthusiast and two-wheeled backpackers. The Guardian
The Celtic Trail is made up of two routes - National Route 4 which goes via the coast and National Route 47 which is an inland route. It takes approximately 30 hours to complete so it's recommended to take it in bite-size chunks. You can view the recommended traffic-free sections at Sustrans (The National Cycle Network).