National Cycle Route 4

National Cycle Route 4 (or NCR 4) is a route of the National Cycle Network, running from London to Fishguard. Between London and Fishguard, the route runs through Reading, Bath, Bristol, Newport, Swansea, Llanelli and St David's. Within Wales, NCR 4 forms one of the branches of the Celtic Trail cycle route.

The route covers a range of roads, cycle paths, and shared use paths.

Rotherhithe | South Bank | Chelsea | Richmond Park | Chertsey | Staines | Eton | Maidenhead

The London to Reading section of the route starts at Greenwich. It then follows the River Thames closely to Putney Bridge. This section of the route has not been finalised. From Putney Bridge to Reading, the route follows the Thames Valley Cycle Route.

Newbury | Hungerford | Devizes | Bradford on Avon

The Reading to Bath section follows the Kennet and Avon Canal. Some sections use the canal towpath, while others are on low-traffic roads. Approaching Bath, Route 24 and the Two Tunnels Greenway provide an alternative route, rejoining Route 4 to the west of the city centre.

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