Between these, the route runs through

Reading Reading is the process of taking in the sense or meaning of letters, symbols, etc., especially by sight or touch. For educators and researchers, reading is a multifaceted process involving such areas as word recognition, orthography (spelling ...

, Bath,

Bristol Bristol () is a city, ceremonial county and unitary authority in England. Situated on the River Avon, it is bordered by the ceremonial counties of Gloucestershire to the north and Somerset to the south. Bristol is the most populous city in ...

, Newport, Swansea and

St David's St Davids or St David's ( cy, Tyddewi, , "David's house”) is a city and a community (named St Davids and the Cathedral Close) with a cathedral in Pembrokeshire, Wales, lying on the River Alun. It is the resting place of Saint David, W ...

. Within Wales, sections of the route follow branches of the

Celtic Trail cycle route The Celtic Trail is a network of dedicated cycle routes in the National Cycle Network, crossing West, South and Mid Wales, and covering 377 miles in total. It is divided into east and west sections. The west section links Pembroke and Fishgua ...

Route

The total length of the path is 443.6 miles and takes an estimated 36 hours to complete by bike. Just under half (47.4%) of the route consists in traffic-free paths.

London to Reading

The route roughly follows the course of the

River Thames The River Thames ( ), known alternatively in parts as the River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the R ...

between London and Reading, and forms a junction with NCR 5 and NCR 23 at the latter. *

Greenwich Greenwich ( , ,) is a town in south-east London, England, within the ceremonial county of Greater London. It is situated east-southeast of Charing Cross. Greenwich is notable for its maritime history and for giving its name to the Greenwich ...

;

Rotherhithe Rotherhithe () is a district of south-east London, England, and part of the London Borough of Southwark. It is on a peninsula on the south bank of the Thames, facing Wapping, Shadwell and Limehouse on the north bank, as well as the Isle of D ...

Surrey Quays Surrey Quays is a largely residential area of Rotherhithe in south-east London, occupied until 1970 by the Surrey Commercial Docks. Previously known as Surrey Docks, the area was renamed following the construction of the Surrey Quays shopping ce ...

; South Bank;

Lambeth Bridge Lambeth Bridge is a road traffic and footbridge crossing the River Thames in an east–west direction in central London. The river flows north at the crossing point. Downstream, the next bridge is Westminster Bridge; upstream, the next bridge i ...

;

Chelsea Chelsea or Chelsey may refer to: Places Australia * Chelsea, Victoria Canada * Chelsea, Nova Scotia * Chelsea, Quebec United Kingdom * Chelsea, London, an area of London, bounded to the south by the River Thames ** Chelsea (UK Parliament consti ...

; Imperial Wharf;

Putney Bridge Putney Bridge is a Grade II listed bridge over the River Thames in west London, linking Putney on the south side with Fulham to the north. The bridge has medieval parish churches beside its abutments: St Mary's Church, Putney is built on the so ...

Richmond Park Richmond Park, in the London Borough of Richmond upon Thames, is the largest of London's Royal Parks, and is of national and international importance for wildlife conservation. It was created by Charles I in the 17th century as a deer park ...

;

Ham Ham is pork from a leg cut that has been preserved by wet or dry curing, with or without smoking."Bacon: Bacon and Ham Curing" in ''Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 2, p. 39. As a processed meat, the term "ham ...

; Hampton Court Palace;

Molesey Molesey is a district of two twin towns, East Molesey and West Molesey, in the Borough of Elmbridge, Surrey, England, and is situated on the south bank of the River Thames. East and West Molesey share a high street, and there is a second retai ...

;

Walton on Thames Walton-on-Thames, locally known as Walton, is a market town on the south bank of the Thames in the Elmbridge borough of Surrey, England. Walton forms part of the Greater London built-up area, within the KT postcode and is served by a wide ran ...

Chertsey Chertsey is a town in the Borough of Runnymede, Surrey, England, south-west of central London. It grew up round Chertsey Abbey, founded in 666 CE, and gained a market charter from Henry I. A bridge across the River Thames first appeared in t ...

(touristic town) or

Laleham Laleham is a village on the River Thames, in the Borough of Spelthorne, about west of central London, England. Historically part of the county of Middlesex, it was transferred to Surrey in 1965. Laleham is downriver from Staines-upon-Thames a ...

(shorter, towpath route) *

Staines Bridge Staines Bridge is a road bridge running in a south-west to north-east direction across the River Thames in Surrey. It is on the modern A308 road and links the boroughs of Spelthorne and Runnymede at Staines-upon-Thames and Egham Hythe. The brid ...

; Coopers Hill; Windsor Great Park;

Windsor Windsor may refer to: Places Australia * Windsor, New South Wales ** Municipality of Windsor, a former local government area * Windsor, Queensland, a suburb of Brisbane, Queensland **Shire of Windsor, a former local government authority around Wi ...

; Eton * Bray; Maidenhead *

Wargrave Wargrave () is a historic village and civil parish in Berkshire, England. The village is primarily on the River Thames but also along the confluence of the River Loddon and lies on the border with southern Oxfordshire. The village has many old ...

;

At its east end, the route meanders mostly set about one "block" back from the

Thames The River Thames ( ), known alternatively in parts as the River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the R ...

, including several small parks. It shortcuts through: Rotherhithe and mid-Pimlico. It finds the Thames at the Chelsea Embankment. It zig-zags through Hurlingham and Barnes Common. It finds the

Thames Path The Thames Path is a National Trail following the River Thames from its source near Kemble in Gloucestershire to the Woolwich foot tunnel, south east London. It is about long. A path was first proposed in 1948 but it only opened in 1996. The ...

at Ham, facing

Teddington Lock Footbridges The Teddington Lock Footbridges are two footbridges over the River Thames in England, situated just upstream of Teddington Lock at Teddington. There is a small island between the bridges. The two footbridges were built between 1887 and 1889, ...

, until Staines-upon-Thames. A longer route from Putney is to remain on the towpath (Thames Path) to avoid traffic.

Reading to Bath

Much longer, the Reading to Bath section follows the Kennet & Avon Cycle Route which partly follows the towpath of the Kennet and Avon Canal and the course of the River Kennet, with other sections on low-traffic roads. Approaching Bath, Route 24 and the

Two Tunnels Greenway The Two Tunnels Greenway is a shared use path for walking and cycling in Bath, Somerset, England. The route links National Cycle Route 24 south of Bath with National Cycle Route 4 in the town centre, and is designated as National Cycle Route 244. ...

are a corollary, rejoining Route 4 west of the city centre.

Bath to Bristol

The Bath to Bristol section of the route follows the

Bristol & Bath Railway Path The Bristol and Bath Railway Path is a off-road cycleway, part of National Cycle Network National Cycle Route 4. It has a wide tarmacked surface, and was used for 2.4 million trips in 2007, increasing by 10% per year. It was built by the c ...

, a dedicated cycle path on a disused railway line. This is entirely traffic-free.

Bristol to Newport

After passing through Bristol city centre, the route heads north into

South Gloucestershire South Gloucestershire is a unitary authority area in the ceremonial county of Gloucestershire, South West England. Towns in the area include Yate, Chipping Sodbury, Thornbury, Filton, Patchway and Bradley Stoke, the latter three forming ...

, and over the

Severn Bridge The Severn Bridge ( cy, Pont Hafren) is a motorway suspension bridge that spans the River Severn between South Gloucestershire in England and Monmouthshire in South East Wales. It is the original Severn road crossing between England and Wale ...

. Passing through

Chepstow Chepstow ( cy, Cas-gwent) is a town and community in Monmouthshire, Wales, adjoining the border with Gloucestershire, England. It is located on the tidal River Wye, about above its confluence with the River Severn, and adjoining the wester ...

, it then goes south, passing through Caldicot before arriving in Newport. The route passes to the north of the

Newport Wetlands Reserve Newport Wetlands is a wildlife reserve covering parts of Uskmouth, Nash and Goldcliff, in the south-east of the city of Newport, South Wales. History The reserve was established in 2000 to mitigate losses of wildlife habitat when the Cardi ...

and across

Newport Transporter Bridge The Newport Transporter Bridge ( cy, Pont Gludo Casnewydd) is a transporter bridge that crosses the River Usk in Newport, South East Wales. The bridge is the lowest crossing on the River Usk. It is a Grade I listed structure. It is one of ...

in the south of the city.

Newport to Llanelli

After Newport, the route heads west to Caerphilly, then north towards Pontypridd during which it crosses the

Taff Trail The Taff Trail ( cy, Taith Taf) is a popular walking and cycle path that runs for between Cardiff Bay and Brecon in Wales. It is so named because it follows the course of the River Taff. Along much of its length, it follows the National Cycl ...

. It then heads west towards

Port Talbot Port Talbot (, ) is a town and community in the county borough of Neath Port Talbot, Wales, situated on the east side of Swansea Bay, approximately from Swansea. The Port Talbot Steelworks covers a large area of land which dominates the south ...

. Near Briton Ferry, it crosses the A48 bridge and then follows the

A483 road The A483, officially described as the Swansea to Manchester Trunk Road, although now ending in Chester, is a major road in the United Kingdom. It runs from Swansea in Wales to Chester in England via Llandovery, Llandrindod Wells, Oswestry ...

(Fabian Way) into Swansea and passes through the

Maritime Quarter The Maritime Quarter (including Swansea Marina) is a residential area of Swansea, Wales, UK located immediately south of the city centre shopping core. It falls within Swansea's Castle ward. The area is bounded by Brynmill to the west, Swansea ...

. Just before the Maritime Quarter, it crosses National Cycle Route 43. It then follows the seafront promenade along

Swansea Bay Swansea Bay ( cy, Bae Abertawe) is a bay on the southern coast of Wales. The River Neath, River Tawe, River Afan, River Kenfig and Clyne River flow into the bay. Swansea Bay and the upper reaches of the Bristol Channel experience a large tid ...

to Blackpill where it turns north up the Clyne Valley cycle track passing the village of

Dunvant Dunvant ( cy, Dyfnant) (Dyfn - deep; nant - stream or brook) is a suburban district and community (parish) in the City and County of Swansea, Wales, and falls within the Dunvant ward. It is situated in a valley some 4.5 miles west of Swansea cit ...

until it reaches

Gowerton Gowerton ( cy, Tregŵyr) is a large village and community, about 4 miles north west of Swansea city centre, Wales. Gowerton is often known as the gateway to the Gower Peninsula. Gowerton's original name was Ffosfelin. The village falls within the ...

. In Gowerton, the trail follows public roads to the south of

Loughor Loughor () ( cy, Casllwchwr) is a Welsh town in the City and County of Swansea, within the Historic counties of Wales, historic county boundaries of Glamorgan, Wales. It lies on the estuary of the River Loughor. The town has a community (Wales), ...

towards the Loughor bridge. Once over the Loughor bridge it continues along the

Millennium Coastal Path The Millennium Coastal Path is a pedestrian walkway and cycleway along the south coast of Carmarthenshire, providing a link between Llanelli and Pembrey Country Park. The cycleway forms a section of both the Celtic Trail cycle route (part of ...

to the south of

Llanelli Llanelli (" St Elli's Parish"; ) is a market town and the largest community in Carmarthenshire and the preserved county of Dyfed, Wales. It is located on the Loughor estuary north-west of Swansea and south-east of the county town, Carmarth ...

Llanelli to Fishguard

NCR 4 follows the

along the south

Carmarthenshire Carmarthenshire ( cy, Sir Gaerfyrddin; or informally ') is a county in the south-west of Wales. The three largest towns are Llanelli, Carmarthen and Ammanford. Carmarthen is the county town and administrative centre. The county is known as ...

coast. Between Pembroke and Haverfordwest, NCR follows the route of a disused railway called the Brunel Trail and crosses over the

Cleddau Bridge The Cleddau Bridge (, cy, Pont Cleddau) in Pembrokeshire, Wales, carries the A477 road over the River Cleddau between Neyland and Pembroke Dock. Errors in the box girder design caused the collapse during construction in 1970. The bridge bec ...

References

External links

Sustrans National Routes
{{DEFAULTSORT:National Cycle Route 04 National Cycle Routes Cycleways in Wales Cycleways in England Cycleways in London Transport in Pembrokeshire Transport in Carmarthenshire Transport in Swansea Transport in Neath Port Talbot Transport in Bridgend County Borough Transport in Rhondda Cynon Taf Transport in Caerphilly County Borough Transport in Newport, Wales Transport in Monmouthshire Transport in Bristol Cycling in Somerset Transport in Wiltshire Transport in Berkshire Transport in Buckinghamshire Transport in Surrey Transport in the Royal Borough of Kingston upon Thames Transport in the London Borough of Richmond upon Thames Transport in the London Borough of Wandsworth