5.0
(1)
24
riders
9
rides
Mountain biking around Cyngor Bro Dyffryn Cennen offers diverse landscapes within Carmarthenshire, largely situated in the Brecon Beacons National Park. The region features the expansive Black Mountain Range, the scenic Towy Valley, and ancient woodlands. Glacial lakes and sweeping escarpments, sculpted by the last Ice Age, provide varied terrain for exploration. This area is recognized for its wide array of mountain biking trails catering to different skill levels.
Last updated: May 7, 2026
3
riders
52.8km
04:54
1,390m
1,390m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
7.19km
00:36
60m
60m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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2
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
2
riders
44.8km
03:01
690m
690m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
8
riders
45.4km
02:39
370m
370m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Near Tumble the trail is closed due to a landslide, so be aware you cannot make it all the way through to crosshands.
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Cycle Route 47 is closed between Tumble and Pontyberem due to a landslide
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The Black Mountain Category 3 Climb from Brynaman is a 5.5km climb with a total ascent of 312m, topping out at 495m. The average gradient is 5.8% with the steepest 100m section reaching 8.4%. Grind out the best gear you can on the consistent slope and gradually as you rise above the valley towards the plateau you are rewarded with some of the best scenery in Wales. You've earnt the descent.
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This beautiful reservoir is framed by the stunning mountain scenery of the Brecon Beacons. From the vantage point of the Swidd Valley Trail, you can enjoy a great view of the reservoir and its picturesque surroundings.
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Lovely cycle path. Nice pub on route just off of cycle path with good food but a little expensive. Route has nice views
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Herbert’s Quarry is part of the Black Mountain and Mynydd Myddfai Registered Landscape of Outstanding Historic Interest in Wales. Unlike in other lime producing areas where canals and tramroads could be built, the industry at Herbert’s Quarry was served solely by road transport. The lime trade was a factor in the development of Turnpike roads, and the network of tracks and roads over the mountain is closely associated with the activity at Herbert’s Quarry. As you walk through the site you are taking a journey through time, and walking in the footsteps of many hundreds and thousands of people before you, people whose hard work, sweat and drudgery shaped this landscape and left a rich industrial legacy.
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NCN43 follows old railways lines, riverbanks and canals from Swansea to Clydach. This section follows an old railway line, it's flat and gravelled, easy riding but pretty and no cars.
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There are 9 mountain bike trails documented in Cyngor Bro Dyffryn Cennen, offering a range of experiences from easy loops to challenging climbs through varied terrain.
The trails cater to various skill levels. You'll find 1 easy route, 7 moderate routes, and 1 difficult route, ensuring options for both beginners and experienced mountain bikers.
Yes, for a gentler ride suitable for families or less experienced riders, consider the Llyn Llech Owain Park loop. This easy 4.5-mile (7.2 km) path offers a pleasant ride around Llyn Llech Owain Park.
The region offers diverse terrain, from the expansive Black Mountain Range and scenic Towy Valley to ancient woodlands and sweeping escarpments. You'll encounter a mix of climbs, descents, and varied surfaces, often sculpted by the last Ice Age, providing stunning views and dynamic riding.
Absolutely. For experienced riders seeking a challenge, the Black Mountain loop from Brynamman is a difficult 32.8-mile (52.8 km) trail with significant elevation gain, offering a demanding ride through the Black Mountain Range.
Many routes offer views of historical sites and natural features. For instance, the Herbert's Quarry – View of Carreg Cennen Castle loop provides stunning vistas of the dramatically located Carreg Cennen Castle. Other notable attractions in the wider area include Dinefwr Castle and Herbert's Quarry.
The area is highly rated by the komoot community, with an average score of 5.0 stars. Riders often praise the diverse landscapes, from the challenging Black Mountain Range to the serene Towy Valley, and the variety of trails catering to all abilities.
Yes, many of the trails are designed as circular routes, allowing you to start and finish at the same point. Examples include the Llyn Llech Owain Park loop and the Black Mountain loop from Brynamman.
While specific routes aren't always directly adjacent to cafes or pubs, many trails are accessible from towns like Llandeilo, which offer various amenities. Planning your route with komoot allows you to identify nearby points of interest for refreshments.
Beyond the immediate area, Carmarthenshire is a hub for cycling. Brechfa Forest offers over 40 kilometers of purpose-built trails, including the challenging Gorlech and Raven trails. Cwm Rhaeadr, near Llandovery, is known for its highly-rated red trail with epic singletrack and views. The nearby Cambrian Mountains also provide opportunities for wilderness riding.
While specific waterfalls aren't highlighted on the listed routes, the wider region, particularly areas like Cwm Rhaeadr on the fringes of the Brecon Beacons, is known for its spectacular valley views and waterfalls, offering scenic backdrops to your ride.
The diverse landscapes of Cyngor Bro Dyffryn Cennen can be enjoyed year-round, but spring and autumn often offer the most pleasant conditions with milder temperatures and vibrant scenery. Summer provides longer daylight hours, while winter rides can be challenging but rewarding, especially in the Black Mountain Range.


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