The Heart of Wales Line

The Heart of Wales Line is a 121-mile rural railway from Shrewsbury to Swansea, through the hills of south Shropshire, Powys and Carmarthenshire. It leaves the main line at Craven Arms, crosses into Wales at Knighton, climbs to two summits, the higher about 300 metres up, and calls at the old spa towns of Llandrindod Wells and Llanwrtyd Wells before following the Tywi valley down to the Loughor estuary and the sea.

The line was built in stages in the 1860s, and it is single track almost all the way. Its two great structures are viaducts: at Knucklas the railway crosses the valley on thirteen stone arches with castle turrets at each end, and at Cynghordy it curves across the Afon Brân on eighteen. In between, the train runs through a tunnel under the summit at Sugar Loaf, where the station is the most remote in Wales.

Transport for Wales runs five trains a day from Shrewsbury to Swansea on weekdays and four back, and two each way on Sundays; the whole journey takes about four hours. Many of the stations are small halts with a shelter and a lane, and a long-distance footpath, the Heart of Wales Line Trail, links them, so the train is as much a way of getting to a walk as it is a ride.

Trains leave Shrewsbury southwards on the Welsh Marches main line and turn off it at Craven Arms, a town that grew up around its railway junction. From here the single track follows the valleys of the Clun and the Teme past Broome, Hopton Heath and Bucknell to Knighton, where the station stands in England and the town it serves is in Wales: the border runs through the car park.

Knighton to Llandrindod Wells

Beyond Knighton the line climbs at up to 1 in 60. At Knucklas it crosses the valley on its castellated viaduct, then reaches its highest point, about 300 metres above sea level, beside the tunnel at Llangynllo. Some stations on the run across old Radnorshire are among the least used in Wales, and some stand well away from their villages: Llanbister Road is about five miles from the one it is named after. The train reaches Llandrindod Wells, the largest town between Craven Arms and Llanelli, which grew as a spa once the railway arrived.

Llandrindod Wells to Llandovery

South of Llandrindod the line passes Builth Road, where it once crossed the Mid Wales Railway (closed in 1962), and follows the Irfon to the old spa towns of Llangammarch Wells and Llanwrtyd Wells. Then comes the long climb to Sugar Loaf, 250 metres up, where the train enters a 1,001-yard tunnel under the hills and comes out in Carmarthenshire. The descent is steep and the views open out at once: the line curves across Cynghordy Viaduct and drops to Llandovery.

Llandovery to Swansea

The last stretch follows the Tywi through Llandeilo and crosses the river at Glanrhyd, on a bridge built in 1988 after the old one was swept away by floods in 1987. Past Ammanford and Pantyffynnon, where the whole line is supervised, a short tunnel before Pontarddulais dates from 1839 and is the oldest still in use in Wales. The line reaches the Loughor estuary, and at Llanelli the train reverses for the final run east along the coast to Swansea.

How the line is worked

The railway is single track, with five passing loops, and has run under a light railway order since 1972. There are no signal boxes along the way: since 1986 it has used a token system in which the train crew operate the token instruments themselves at each loop, overseen by the signaller at Pantyffynnon. Trains are Class 150 Sprinters, built by British Rail at York between 1984 and 1987, and single-car Class 153s, converted from two-car Class 155 units in 1991–92. See also the Cambrian Coast Line, the other long rural Transport for Wales line on this site.

Transport for Wales runs five trains a day from Shrewsbury to Swansea on weekdays and four back, and two each way on Sundays. The journey takes about four hours, a little longer on trains that wait to pass another at Llandrindod.

Southbound, Monday to Friday

Northbound, Monday to Friday

Good to know:

• Early trains. On weekdays a train also leaves Shrewsbury at 04:30 for Llandrindod, and early trains run to Shrewsbury from Llandrindod at 06:05 and from Llandovery at 06:17.
• Saturdays have the same southbound trains (the late-morning one leaves Shrewsbury at 11:30). Northbound, trains leave Swansea at 04:50, 07:30, 10:38, 14:59 and 17:48, all running through to Shrewsbury.
• Sundays have two trains each way: from Shrewsbury at 12:08 and 16:20, reaching Swansea at 16:16 and 20:30, and from Swansea at 11:10 and 15:18, reaching Shrewsbury at 15:16 and 19:36.
• Request stops. Several of the small stations, among them Llangynllo, Sugar Loaf and Cynghordy, are request stops: tell the conductor where you want to get off, and signal to the driver to be picked up.
• On board. There is usually no trolley service, so take food and drink with you.

Times as of October 2026, from the National Rail journey planner for Tuesday 13, Saturday 17 and Sunday 18 October; at Llandrindod the times are departures. Check your date on tfw.wales (opens in a new tab).

The Heart of Wales Line is part of the National Rail network, so tickets are ordinary National Rail fares, in Standard class only. Sampling the National Rail journey planner for one adult from Shrewsbury to Swansea on Tuesday 13 October 2026, the lowest single on a Heart of Wales train was £28.10, and the lowest return £36.80. Ticket offices are at Shrewsbury, Llandrindod, Llanelli and Swansea; elsewhere, buy on the train, online or in the Transport for Wales app.

For a day out, the Heart of Wales Circular Day Ranger covers a loop in either direction from Cardiff by way of Craven Arms, Shrewsbury, Llandrindod, Llanelli and Swansea, for £53, or £26.50 for a child. Fares checked October 2026 on the National Rail journey planner (opens in a new tab) and tfw.wales (opens in a new tab); pounds sterling.

Interrail passes are valid. Interrail's own table of railway companies for Great Britain lists Transport for Wales as included, so the line is covered by a one-country Interrail Great Britain Pass or a Global Pass. Seat reservations are not offered on Transport for Wales trains, so there is nothing to book.

Visitors who do not live in the UK can also buy a BritRail Great Britain Pass, which is valid on National Rail services across England, Scotland and Wales. Note that the regional BritRail South West & South Wales Pass does not cover Transport for Wales trains.

For this journey alone, a pass is not worth buying. A single from Shrewsbury to Swansea sampled at £28.10, and the Heart of Wales Circular Day Ranger costs £53. A pass pays only when the line is one day of a longer trip around Britain.

Checked October 2026 against interrail.com (opens in a new tab) and britrail.com (opens in a new tab).

With five trains a day, the line rewards an overnight stop more than a quick hop: get off in the morning, look round or walk to the next station, and catch the afternoon train on. The places below run from north to south, from Craven Arms to Swansea.

Two hotels in the spa towns make good halfway stops. The Metropole is the big hotel of Llandrindod Wells, and the Neuadd Arms stands on the square in Llanwrtyd Wells, a few stops further south.

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