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MTB trails
United Kingdom
Wales
South Wales
Carmarthenshire

Llanfair-Ar-Y-Bryn

The best MTB trails around Llanfair-Ar-Y-Bryn

4.4

(30)

354

riders

11

rides

Mountain biking around Llanfair-Ar-Y-Bryn offers routes through the scenic Doethie Valley and around Llyn Brianne. The region is characterized by varied terrain, including forest trails, open mountain landscapes, and lakeside paths. Riders can expect a mix of ascents and descents, providing diverse challenges for mountain bikers. The area's natural features, such as the Cambrian Mountains, contribute to a dynamic riding experience.

Best mountain bike trails around Llanfair-Ar-Y-Bryn

  • The most popular mountain bike trail is Doethie Valley and Llyn Brianne loop

Last updated: May 4, 2026

5.0

(1)

11

riders

#1.

Doethie Valley and Llyn Brianne loop

33.9km

03:09

770m

770m

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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Moderate

3.0

(1)

5

riders

Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.

Hard
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5.0

(1)

3

riders

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate
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Popular around Llanfair-Ar-Y-Bryn

The Dragon's Back – running the spine of Wales

Road Cycling Routes around Llanfair-Ar-Y-Bryn

Hiking around Llanfair-Ar-Y-Bryn

Cycling around Llanfair-Ar-Y-Bryn

Gravel biking around Llanfair-Ar-Y-Bryn

Running Trails around Llanfair-Ar-Y-Bryn

Other adventures around Llanfair-Ar-Y-Bryn

The Dragon's Back – running the spine of Wales

Running Collection by

Jen & Sim Benson

Tips from the Community

Zoe Evans
November 17, 2023, RSPB Gwenffrwd-Dinas Nature Reserve

THE TALE OF THE WELSH “ROBIN HOOD” Known as Twm Siôn Cati Twm Siôn Cati is a historically known figure in Welsh folklore. A tale recounted by Meyrick recalls how Twm was asked by a poor man to steal a pitcher for him. They went together to a merchant where Twm started belittling the man's wares. Having told his friend secretly to take the pitcher of his choice, Twm distracted the merchant by telling him there was a hole in one of the pitchers, which the man denied. Twm desired him to put his hand in the pitcher to test it and the man still denied there was a hole. Twm then asked him how, if there was no hole, could he have put his hand inside? By this time his friend had disappeared with his pitcher, undetected. A tale from Prichard's book involves an occasion when Twm is staying in an inn overnight and realises other people are planning to rob him the following day after he sets off. He has a large sum of money with him. The following morning he behaves as though his money is in the pack-saddle of his horse. When the highwayman catches up, Twm drops the saddle in the middle of a pool. The highwayman wades into the pool to fetch it, Twm takes the opportunity to make off with the highwayman's horse. A complication arises because the horse responds to the voice of the highwayman crying "Stop!" Luckily Twm, in terror, happens to shout a word which makes the horse gallop on again, and he is conveyed to safety. Another tale recounts how Twm waylaid a rich squire, who was accompanied by his daughter, Twm was so smitten with her that he returned her jewellery to her and attempted to woo her, against her father's opposition and, initially, her own. One full moon shortly after the robbery, he crept to her window, roused her from sleep, caught her hand at the window and kissed it, refusing to let her go until she promised to marry him. She wouldn't promise so Twm drew his dagger, drew blood on her wrist and threatened to sever her hand unless she assented to marriage forthwith. She agreed to marry him and she kept her hand. Their marriage followed soon after, despite her father's views and the directness of Twm's courtship methods. The girl was supposedly the widow of the sheriff of Carmarthen. Through this marriage Twm is supposed to have gained respectability, eventually becoming a justice of the peace, sitting in judgement on others, a position he held until his death aged 79.

1

0

Lovely mix of fire road to start with and then a huge climb up and over into a valley that time forgot - perfect single track - although can be a bit muddy in places. Probably best to make sure there has not been too much rain in the week before riding this route - and in the winter be prepared for quick changes of weather and plummeting temperatures.

1

0

Largest man made lake in mid wales

1

0

A fantastic gravel track to the old chapel

1

0

This attractive RSPB site has a circular footpath adjacent to a river with beautiful rock cascades and old mossy trees. It is also home to the Twm Sion Cati's cave. All worth a look off of the bike.

1

0

Alex
November 23, 2022, Capel Soar y Mynydd

Capel Soar Y Mynydd is the most remote chapel in Wales. An invaluable spot to find some shelter on longer trips!

2

0

Alex
November 23, 2022, Forest Track

Top quality forest track.

1

0

Llyn Brianne is a spectacular reservoir at almost 300m (990ft) above sea level. It is Wales second largest reservoir by volume and is contained by a 91m (300ft) stone-built dam, which is the largest of its kind in Europe.

1

0

Frequently Asked Questions

How many mountain bike trails are available around Llanfair-Ar-Y-Bryn?

There are 11 mountain bike trails around Llanfair-Ar-Y-Bryn, offering a range of experiences through varied terrain. These include 7 moderate routes and 4 difficult routes, ensuring options for different skill levels.

Are there any easy mountain bike trails for beginners in Llanfair-Ar-Y-Bryn?

While there are no trails specifically graded as 'easy' in this selection, there are 7 moderate routes that could be suitable for beginners looking for a challenge, or those with some prior mountain biking experience. For example, the Doethie Valley and Llyn Brianne loop is a moderate 33.9 km trail with scenic views.

What are the most challenging mountain bike trails in the area?

For experienced riders seeking a challenge, the Llyn Brianne and the Cambrian Mountains loop is a difficult 49.5 km route featuring expansive views and demanding ascents. There are 4 difficult trails in total, offering significant elevation gains and technical sections.

Are there any circular mountain bike routes in Llanfair-Ar-Y-Bryn?

Yes, all the mountain bike routes listed for Llanfair-Ar-Y-Bryn are circular loops. This includes popular options like the Brynffo and Esgair Fwyog loop, which is a 23.0 km trail through forest and moorland.

What kind of terrain can I expect on mountain bike trails around Llanfair-Ar-Y-Bryn?

The terrain around Llanfair-Ar-Y-Bryn is diverse, featuring a mix of forest trails, open mountain landscapes, and lakeside paths, particularly around Llyn Brianne. Riders will encounter varied challenges with both ascents and descents across the rolling terrain of the Cambrian Mountains.

What do other mountain bikers say about the trails in Llanfair-Ar-Y-Bryn?

The mountain bike trails in Llanfair-Ar-Y-Bryn are highly rated by the komoot community, with an average score of 4.4 stars from around 30 reviews. Riders often praise the varied terrain, the stunning scenery of the Doethie Valley and Llyn Brianne, and the challenging nature of the routes.

What are some interesting places to see along the mountain bike trails?

While riding, you can explore several points of interest. The Twm Siôn Cati's Cave is a notable historical site, and the Wolf's Leap on the River Irfon offers a dramatic gorge view. Many routes also pass by the scenic Llyn Brianne Gravel Road.

Are there any historical landmarks or natural monuments nearby?

Yes, the area is rich in both. You can visit the Llandovery Castle Ruins for a glimpse into history. For natural monuments, consider exploring the Mynydd Myddfai Trig Point or the Pen y Garn-goch Summit for panoramic views.

What is the average distance of mountain bike trails in Llanfair-Ar-Y-Bryn?

The mountain bike trails in Llanfair-Ar-Y-Bryn vary in length. For example, the Singletrack Gravel Path – Chrychan Forest loop is about 22.6 km, while the Twm Siôn Cati's Cave – Llyn Brianne Dam Crossing loop is around 28.5 km. The longest route is nearly 50 km, offering options for various endurance levels.

What is the best time of year for mountain biking in Llanfair-Ar-Y-Bryn?

While mountain biking is possible year-round, the spring and autumn months generally offer the most pleasant conditions with milder temperatures and vibrant scenery. Summer can be excellent, but be prepared for potentially warmer weather. Winter riding is possible but may involve colder temperatures and wetter, muddier trails.

Are there any routes that offer views of the Cambrian Mountains?

Absolutely. The Llyn Brianne and the Cambrian Mountains loop is specifically designed to showcase expansive views across the Cambrian Mountains, providing a truly immersive experience in the region's natural beauty.

Most popular routes around Llanfair-Ar-Y-Bryn

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