The Taff Trail - NCN Route 8

The Merthyr Tydfil section of the Taff Trail (National Cycle Network Route 8 & 46) is a 14-mile, mainly traffic-free route, designed for walkers, runners, cyclists and horse riders. 

Using former tramways, railways, canals and towpaths you can enjoy all that Merthyr (once the iron capital of the world) has to offer.  Travelling north through Merthyr Town takes you across the spectacular Grade II listed Cefn Coed Viaduct. You’ll pass through woodlands and nature reserves crossing the historic Pontsarn Viaduct as you climb gently to Pontsticill Reservoir and onwards to Brecon through the National Park.

Following Route 8 from Merthyr Tydfil to Brecon Town is a 25 mile (40k) route that takes around 2hrs on a mixture of Asphalt (60%) and loose (40%), and it's 60% traffic-free.

With the heart of the Taff Trail running through Merthyr Tydfil, there's plenty of occasions to stop off for a spot of lunch or explore many of the historic villages and sites that are situated nearby.

For maps and updates, visit the Sustrans.

The Taff Trail is part of Lôn Las Cymru

The Taff Trail is just a part of the spectacular NCN Route 8, also known as Lôn Las Cymru. It's an exciting long-distance route that will challenge and amaze you as it passes through wild and beautiful Welsh landscapes. The route starts in Cardiff and passes two national parks - Brecon Beacons and Snowdonia, before finishing on the island of Anglesey. It's 243 miles long and takes around 20hrs to complete. Follow the link to the Sustrans website to find maps of the whole route.

Our latest videos help to capture the essence of the majestic Taff Trail at Merthyr Tydfil.

What You'll See

Cyfarthfa Castle & Park – A grand 19th-century mansion with landscaped gardens, a museum, and café.
Pontsarn Viaduct – A dramatic stone structure spanning the River Taff, surrounded by woodland.
Pontsticill Reservoir – A tranquil spot with stunning views and picnic areas.
Brecon Mountain Railway – A heritage steam railway running alongside the trail, adding charm and character.

Trail Features
Length - 14 miles through Merthyr Tydfil
Surface - Mostly traffic-free and well-maintained
Difficulty - Moderate – suitable for leisure cyclists and walkers, with some gentle climbs
Access Points - Easily joined from Rhydycar, Pentrebach, Pant, and Pontsticill

A Trail Through Time
The Merthyr section of the Taff Trail winds through landscapes shaped by industry, nature, and regeneration. From ironworks to reservoirs, castles to forests, it offers a rich and varied experience for all ages.

Onward Connectivity - whole 55 mile route Sustrans
Links south to Pontypridd, Castell Coch, and Cardiff Bay. This is a easy-moderate route heading downhill.
Connects north to Brecon and the Monmouthshire & Brecon Canal
Intersects with the Heads of the Valleys Cycle Network and Three Parks Trail, making Merthyr a key hub for trail exploration. You'll see Torpantau Pass – The highest point on the trail, offering panoramic views of the Brecon Beacons.  This is a moderate route with steep and long uphill climbs.

The Taff Trail is just one of a series of trails running right through the county borough that encapsulates the area's history complemented by miles and miles of natural beauty. So if you want to take time to stop at one of our amazing adventure attractions, learn about our history, shop, eat, sleep or just take a moment to savour the breathtaking scenery. Merthyr has it all.