Walks you can reach from Builth Road by train

Circular on footpaths and rights of way around the border town of Knighton, set on the River Teme close to the Offa's Dyke Path.

Walk details: Heart of Wales Line Travellers (PDF).

Long section into Carmarthenshire through Crychan Forest, crossing the railway, the Afon Brân and several streams, with fine views of the great arches of Cynghordy Viaduct on the descent.

Cynghordy Viaduct: Imposing 18-arch curved railway viaduct near Cynghordy, one of the most striking structures on the line.

Warnings: Long, remote forest and hill section with few facilities; come prepared.

Walk details: Heart of Wales Line Travellers (PDF).

Old drovers' routes past Rhandirberthog and Cefnrickett farms, crossing the Tywi at the elegant 1773 Dolauhirion Bridge, with views to the Brecon Beacons and Carmarthen Fans, into the market town of Llandovery.

Warnings: Hill section with limited facilities en route.

Walk details: Heart of Wales Line Travellers (PDF).

Open moorland on Glyndŵr's Way over Racecourse Common, descending past the hilltop remains of Knucklas Castle and its castellated railway viaduct into the village.

Knucklas Viaduct: Castellated 13-arch railway viaduct carrying the Heart of Wales line across the Heyope valley at Knucklas.

Warnings: Open hill and common land; some exposure.

Walk details: Heart of Wales Line Travellers (PDF).

Hill section along an old droving road, past the Caer Caradoc hill fort above Chapel Lawn and a stretch of the Offa's Dyke Path across the England-Wales border, dropping over the Teme into Knighton.

Warnings: Long, exposed section over open hill ground with few facilities until Knighton.

Walk details: Rail Rambles.

Similar walk: Heart of Wales Line Travellers (PDF).

Past the restored keep of Hopton Castle, then up through Hopton Wood and over Bucknell Hill, with riverside stretches in the Redlake valley.

Hopton Castle: Restored medieval keep, scene of a notable Civil War siege, standing in a quiet valley near the village of the same name.

Warnings: Remote upland and woodland walking with few facilities; come prepared.

Walk details: Heart of Wales Line Travellers (PDF).

Walk details: Rail Rambles.

Hilly section with extensive climbing and views to the Radnor Forest, past Rhos Farm, St Michael's Hall and the historic thatched Quaker meeting house at The Pales.

Warnings: Exposed hill walking with sustained climbs and few facilities.

Walk details: Heart of Wales Line Travellers (PDF).

Long, remote moorland over Goytre Hill and Wernygeufron common, crossing the River Lugg past the ruins of Fronfelen farm.

Warnings: Long, very remote moorland crossing with extensive open ground and no facilities; navigation skills and full hill kit needed.

Walk details: Heart of Wales Line Travellers (PDF).

Recommended: Some amazing views and so incredibly peaceful; some stunning views down the valleys. A long, challenging but beautiful route through rolling hills and wide valleys and sticking to the Heart of Wales Trail and Glyndwr's Way on well-marked paths and quiet country lanes. Lots of ups and downs with amazing long-range views from the hilltops; some muddy sections. Follows the Heart of Wales Trail and Glyndwr's Way; can be split at Llanbister Road station; rich in buzzards and red kites; St Michael's Church outside Llandrindod makes a good picnic spot.

Time: 10h–20h30

Warnings: A long, challenging route best split over two days; a short section of A-road near Pen-y-bont, though the adjacent moorland can be walked instead.

Walk details: Slow Ways.

Recommended: The hills and valleys are beautiful. A long, remote walk through beautiful Welsh hill country, largely on the Heart of Wales Trail, with great river sections, rolling-countryside views and some boggy sections and stiles. There is a particularly steep, long climb into Crychan Forest if starting at Llandovery and country lanes with hardly any traffic. Uses the Heart of Wales Trail, which runs alongside the Heart of Wales rail line, so trains link the two towns and the walk can be shortened at Cynghordy station. Passes the Cwmcuttan (Cynghordy) Viaduct.

Cynghordy Viaduct: Imposing 18-arch curved railway viaduct near Cynghordy, one of the most striking structures on the line.

Time: 7h30–14h30

Warnings: The route crosses the railway line at several points; stop and listen before crossing. Some boggy sections and stiles.

Walk details: Slow Ways.

Recommended: One of the prettiest Slowways I have walked. One of the prettiest routes around, sticking to the Heart of Wales Trail and using quiet country lanes through pretty little valleys, woodlands and streams. Lots of ups and downs across small hills and valleys but nothing challenging and with a few steep sections; some muddy stretches. Follows the Heart of Wales Trail; the section through Goleugoed and Llwynywormwood is particularly pretty; rich in buzzards, kites, rabbits and squirrels; good bus and (replacement) train links.

Time: 3h30–7h

Walk details: Slow Ways.

Reverse direction: Heart of Wales Line Travellers (PDF).