| Route | Crewe North and Holyhead (North Wales Coast) Line |
| Section | Chester South Jn to Holyhead |
| ELR Maps | Atlas , Interactive |
| Area Maps | Chester , Shotton , Llandudno Junction , Gaerwen , Holyhead |
| Extent | 179M 1108y to 263M 1586y • 84.272 miles • 135.622 km |
| Measured | 135.889 km (Δ +267m) ⚠️ Large variation between reported and measured extents |
| Grouping | CNH1 , CNH2 , CNH3 |
| Neighbours | CNH2 , CVS , GLA , LJT1 , LLJ , WDB1 , WSJ2 |
| NR Regions | North West & Central • 179M 1108y to 188M 0868y Wales & Western • 188M 0869y to 263M 1586y |
 | TRACKmaps Book 3 — Western & Wales TRACKmaps Book 4 — Midlands & North West |
🏢 Administrative Area
| Mileage | Country | Administrative Area |
|---|---|---|
| 179M 1108y to 180M 1748y | England | Cheshire |
| 180M 1749y to 203M 1022y | Wales | Flintshire |
| 203M 1023y to 210M 0010y | Wales | Denbighshire |
| 210M 0011y to 210M 0142y | Wales | Conwy |
| 210M 0143y to 210M 0648y | Wales | Denbighshire |
| 210M 0649y to 232M 0824y | Wales | Conwy |
| 232M 0825y to 241M 0450y | Wales | Gwynedd |
| 241M 0451y to 261M 0010y | Wales | Anglesey |
| 261M 0011y to 263M 1586y | Wales | Gwynedd |
📍 Nearest Place and District
| Mileage | Nearest Place | District / County | Distance |
|---|---|---|---|
| 179M 1108y to 179M 1704y | Newtown | Cheshire West and Chester | 214m - 563m |
| 179M 1705y to 180M 0758y | Chester | Cheshire West and Chester | 527m - 687m |
| 180M 0759y to 181M 0362y | Curzon Park | Cheshire West and Chester | 284m - 722m |
| 181M 0363y to 182M 1176y | Saltney | Cheshire West and Chester | 465m - 1967m |
| 182M 1177y to 183M 1000y | Bretton | Flintshire | 1895m - 2225m |
| 183M 1001y to 185M 0582y | Sandycroft | Flintshire | 196m - 2236m |
| 185M 0583y to 185M 0868y | Mancot Royal | Flintshire | 589m - 644m |
| 185M 0869y to 186M 0120y | Pentre | Flintshire | 81m - 588m |
| 186M 0121y to 186M 1418y | Queensferry | Flintshire | 273m - 1010m |
| 186M 1419y to 187M 0032y | Shotton | Flintshire | 1021m - 1143m |
| 187M 0033y to 187M 0098y | Wepre | Flintshire | 1105m - 1141m |
| 187M 0099y to 188M 0076y | Connah’s Quay | Flintshire | 75m - 1087m |
| 188M 0077y to 188M 1220y | Golftyn | Flintshire | 72m - 519m |
| 188M 1221y to 189M 0538y | Kelsterton | Flintshire | 82m - 521m |
| 189M 0539y to 189M 1528y | Rockcliffe | Flintshire | 38m - 452m |
| 189M 1529y to 190M 1374y | Oakenholt | Flintshire | 369m - 1268m |
| 190M 1375y to 191M 0318y | Mount Pleasant | Flintshire | 851m - 1276m |
| 191M 0319y to 192M 0890y | Flint | Flintshire | 305m - 1378m |
| 192M 0891y to 193M 0956y | Bryn Merllyn | Flintshire | 140m - 1386m |
| 193M 0957y to 194M 0296y | Bagillt | Flintshire | 196m - 749m |
| 194M 0297y to 194M 1198y | Whelston | Flintshire | 337m - 751m |
| 194M 1199y to 195M 0626y | Walwen | Flintshire | 193m - 795m |
| 195M 0627y to 196M 1044y | Greenfield | Flintshire | 416m - 1259m |
| 196M 1045y to 197M 1176y | Llannerch-y-môr | Flintshire | 164m - 1277m |
| 197M 1177y to 198M 0362y | Glan-y-don | Flintshire | 165m - 466m |
| 198M 0363y to 198M 0516y | Maes Pennant | Flintshire | 448m - 492m |
| 198M 0517y to 198M 1506y | Mostyn | Flintshire | 151m - 479m |
| 198M 1507y to 199M 0978y | Rhewl-Mostyn | Flintshire | 491m - 1485m |
| 199M 0979y to 201M 0296y | Ffynnongroyw | Flintshire | 174m - 1501m |
| 201M 0297y to 201M 1682y | Tanlan Banks | Flintshire | 650m - 1106m |
| 201M 1683y to 202M 0450y | Talacre | Flintshire | 701m - 893m |
| 202M 0451y to 203M 0076y | Gwespyr | Flintshire | 876m - 1290m |
| 203M 0077y to 204M 0890y | Gronant | Flintshire | 825m - 1465m |
| 204M 0891y to 207M 0010y | Prestatyn | Denbighshire | 231m - 2574m |
| 207M 0011y to 207M 0582y | Meliden | Denbighshire | 2589m - 2946m |
| 207M 0583y to 209M 1440y | Rhyl | Denbighshire | 364m - 2946m |
| 209M 1441y to 211M 0164y | Kinmel Bay | Conwy | 339m - 1211m |
| 211M 0165y to 212M 0274y | Towyn | Conwy | 422m - 983m |
| 212M 0275y to 213M 0054y | Belgrano | Conwy | 173m - 1001m |
| 213M 0055y to 214M 0032y | Pensarn | Conwy | 127m - 1161m |
| 214M 0033y to 214M 0868y | Abergele | Conwy | 1173m - 1718m |
| 214M 0869y to 215M 1000y | Terfyn | Conwy | 600m - 1730m |
| 215M 1001y to 216M 1044y | Llanddulas | Conwy | 355m - 1040m |
| 216M 1045y to 216M 1594y | Mynydd Marian | Conwy | 969m - 1036m |
| 216M 1595y to 217M 0934y | Penmaen Rhôs | Conwy | 374m - 988m |
| 217M 0935y to 218M 0032y | Tan-y-Lan | Conwy | 91m - 402m |
| 218M 0033y to 218M 0692y | Old Colwyn | Conwy | 339m - 537m |
| 218M 0693y to 219M 1154y | Colwyn Bay | Conwy | 371m - 1755m |
| 219M 1155y to 220M 0626y | Rhôs-on-Sea | Conwy | 902m - 1762m |
| 220M 0627y to 221M 0274y | Bron-y-Nant | Conwy | 307m - 895m |
| 221M 0275y to 221M 1374y | Mochdre | Conwy | 388m - 684m |
| 221M 1375y to 222M 1418y | Dolwyd | Conwy | 241m - 1092m |
| 222M 1419y to 223M 1352y | Llandudno Junction | Conwy | 483m - 1102m |
| 223M 1353y to 223M 1550y | Tywyn | Conwy | 788m - 797m |
| 223M 1551y to 224M 1132y | Conwy | Conwy | 129m - 791m |
| 224M 1133y to 225M 0670y | Cadnant Park | Conwy | 86m - 903m |
| 225M 0671y to 226M 0494y | Mount Pleasant | Conwy | 918m - 1976m |
| 226M 0495y to 226M 0560y | Capelulo | Conwy | 1967m - 1979m |
| 226M 0561y to 226M 1088y | St Gwynan’s | Conwy | 1697m - 1957m |
| 226M 1089y to 228M 0516y | Dwygyfylchi | Conwy | 429m - 1685m |
| 228M 0517y to 229M 1660y | Penmaenmawr | Conwy | 276m - 1754m |
| 229M 1661y to 231M 0868y | Penmaen Park | Conwy | 277m - 1764m |
| 231M 0869y to 232M 0208y | Llanfairfechan | Conwy | 756m - 1232m |
| 232M 0209y to 232M 0956y | Pentre Uchaf | Conwy | 1248m - 1789m |
| 232M 0957y to 234M 0384y | Abergwyngregyn | Gwynedd | 700m - 1774m |
| 234M 0385y to 235M 1462y | Crymlyn | Gwynedd | 923m - 1774m |
| 235M 1463y to 237M 0274y | Tal-y-bont | Gwynedd | 218m - 1765m |
| 237M 0275y to 237M 1682y | Llandygai | Gwynedd | 252m - 884m |
| 237M 1683y to 238M 0296y | Maesgeirchen | Gwynedd | 830m - 884m |
| 238M 0297y to 238M 1154y | Minffordd | Gwynedd | 516m - 830m |
| 238M 1155y to 239M 0956y | West End | Gwynedd | 256m - 866m |
| 239M 0957y to 240M 0098y | Menai Bridge | Isle of Anglesey | 700m - 856m |
| 240M 0099y to 240M 1704y | Penrhos Garnedd | Gwynedd | 719m - 1235m |
| 240M 1705y to 241M 0318y | Capel-y-graig | Gwynedd | 1244m - 1462m |
| 241M 0319y to 242M 1242y | Llanfair Pwllgwyngyll | Isle of Anglesey | 58m - 1456m |
| 242M 1243y to 244M 0098y | Star | Isle of Anglesey | 390m - 1400m |
| 244M 0099y to 246M 0494y | Llanddaniel Fab | Isle of Anglesey | 861m - 2454m |
| 246M 0495y to 246M 0890y | Gaerwen | Isle of Anglesey | 2467m - 2671m |
| 246M 0891y to 248M 1220y | Llangaffo | Isle of Anglesey | 1020m - 2654m |
| 248M 1221y to 249M 1506y | Pen-Iôn | Isle of Anglesey | 488m - 1405m |
| 249M 1507y to 250M 0934y | Malltraeth | Isle of Anglesey | 458m - 799m |
| 250M 0935y to 250M 1506y | Trefdraeth | Isle of Anglesey | 810m - 922m |
| 250M 1507y to 251M 0670y | Bethel | Isle of Anglesey | 797m - 915m |
| 251M 0671y to 252M 0450y | Llangadwaladr | Isle of Anglesey | 774m - 1393m |
| 252M 0451y to 253M 0318y | Soar | Isle of Anglesey | 1366m - 1942m |
| 253M 0319y to 254M 1198y | Ty Croes | Isle of Anglesey | 12m - 1921m |
| 254M 1199y to 254M 1726y | Bryn Du | Isle of Anglesey | 382m - 461m |
| 254M 1727y to 255M 1704y | Llanfaelog | Isle of Anglesey | 249m - 1130m |
| 255M 1705y to 257M 0208y | Rhosneigr | Isle of Anglesey | 1144m - 2123m |
| 257M 0209y to 259M 0450y | Llanfairyneubwll | Isle of Anglesey | 204m - 2131m |
| 259M 0451y to 260M 1594y | Valley | Isle of Anglesey | 69m - 1338m |
| 260M 1595y to 262M 0780y | Penrhos | Isle of Anglesey | 82m - 1328m |
| 262M 0781y to 262M 1506y | Môrawelon | Isle of Anglesey | 673m - 1149m |
| 262M 1507y to 263M 0780y | Kingsland | Isle of Anglesey | 293m - 656m |
| 263M 0781y to 263M 1088y | Stryd | Isle of Anglesey | 468m - 503m |
| 263M 1089y to 263M 1586y | Holyhead | Isle of Anglesey | 149m - 494m |
🏷️ Positional Accuracy Statistics
| Property | Count | Min | Max | Mean | Median | Std Dev |
|---|---|---|---|---|---|---|
| Linear Accuracy | 329 | -88m | 94m | 1m | 1m | 12m |
| Normalised Quarter Miles | 329 | 344y | 543y | 441y | 441y | 13y |
| Calibration Segment Length | 329 | 212y | 1586y | 451y | 440y | 94y |