3.6
(6)
60
riders
4
rides
No traffic touring cycling routes around Llyn y Fan Fawr are set within the western Brecon Beacons National Park, characterized by striking glacial topography, prominent peaks, and rugged terrain. The area features glacial lakes, including Llyn y Fan Fawr itself, situated at the foot of Fan Brycheiniog in the Black Mountain range. Touring cyclists can expect routes that traverse river valleys and offer significant elevation gains, providing challenging yet rewarding rides with diverse views. While some paths may be unpaved…
Last updated: May 17, 2026
4.8
(4)
9
riders
Embark on a difficult touring bicycle loop through the dramatic landscapes of Bannau Brycheiniog (Brecon Beacons) National Park. This challenging 33.1-mile (53.3 km) route, which takes around 3 hours and…
1
riders
23.0km
02:01
340m
340m
Hard bike ride. Good fitness required. You may need to push your bike for some segments of this route.

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6
riders
37.7km
02:51
610m
610m
Cycle the difficult 23.4-mile Trecastle and Myddfai loop from Usk Reservoir, gaining 2012 feet with diverse Brecon Beacons views.
3.0
(1)
24
riders
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
3.0
(1)
11
riders
28.9km
02:26
480m
480m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Stop, listen, and relax with nature sounds
1
0
Henrhyd Falls in the Brecon Beacons National Park, Wales, is the tallest waterfall in southern Wales with a drop of 90 feet. It lies on National Trust land, in the traditional county of Brecknockshire. The nearest settlement to it is Coelbren, on the road between Glynneath and Abercraf.
5
0
Excellent track around the reservoir suitable for most bikes with gravel tyres. The Usk Reservoir, also known as Cronfa Wysg in Welsh, sits at an elevation of 1,006 feet (307 m) in the upper Usk Valley within the Brecon Beacons National ParK. It marks the county boundary between Carmarthenshire and Powys.
1
0
great scenery, tough climb
0
0
Henrhyd Falls is the tallest waterfall in southern Wales with a drop of around 90 feet 927 m). It's managed by the National Trust and visible via a short walk down into the gorge below. It's not bike suitable but is worth leaving the bikes for a look. The mobile cafe at the car park serves snacks, ice cream, burgers, and drinks. They also run a campsite.
2
0
A beautiful section the Cycle Across the Beacons route, with the road passing to the South of the Usk reservoir and crossing the River Usk itself.
1
0
There are currently 4 dedicated no-traffic touring cycling routes listed around Llyn y Fan Fawr. These routes offer a mix of challenges, from easy loops to more difficult rides through the scenic Brecon Beacons National Park.
The terrain around Llyn y Fan Fawr for touring cyclists is varied. While some routes feature smoother paths, others, particularly those closer to the glacial lakes and mountains, can involve unpaved sections, gravel, and significant elevation gains. Expect a rewarding challenge with diverse views. For example, the Bwlch Cerrig Duon & Henrhyd Falls loop is rated difficult, indicating varied and potentially rugged surfaces.
Yes, there is one easy no-traffic touring cycling route available. The Usk Reservoir Track – Stream Under Old Metal Bridge loop from Usk Reservoir Dam offers a gentler ride, perfect for those looking for a less strenuous experience while still enjoying the beautiful surroundings.
Yes, all the listed no-traffic touring cycling routes in this guide are circular, allowing you to start and end at the same point. This includes routes like the Trecastle and Myddfai loop from Usk Reservoir, which provides a full loop experience.
The routes offer stunning views of the dramatic glacial landscapes of the western Brecon Beacons. You might encounter the majestic Llyn y Fan Fawr itself, the peaks of the Carmarthen Fans like Fan Brycheiniog, and river valleys. Some routes, like the Bwlch Cerrig Duon & Henrhyd Falls loop, even pass by beautiful waterfalls along the Nant-y-Llyn river.
While many routes in the area are rated difficult due to elevation and varied terrain, the Usk Reservoir Track – Stream Under Old Metal Bridge loop from Usk Reservoir Dam is an easy option that could be suitable for families with some cycling experience. Always check the route details for distance and elevation to ensure it matches your family's capabilities.
The best time for touring cycling in Llyn y Fan Fawr is generally during the drier months, from late spring to early autumn (May to September). This avoids the potentially boggy conditions and harsher weather that can occur in other seasons, making for a more enjoyable and safer ride on the varied terrain.
While the immediate vicinity of Llyn y Fan Fawr is quite remote, you can find amenities in nearby villages. Areas around Usk Reservoir, Trecastle, and Llanddeusant may offer cafes or pubs where you can refuel. It's advisable to check opening times and availability before you set out, especially in quieter seasons.
The area is highly rated by the komoot community, with an average score of 3.6 stars. Reviewers often praise the dramatic, unspoiled landscapes, the challenging yet rewarding climbs, and the sense of remoteness and tranquility offered by these no-traffic routes. The stunning views of the glacial lakes and surrounding peaks are frequently highlighted.
Yes, the Llyn y Fan Fawr area is rich in wildlife. Cyclists often report sightings of wild horses and majestic kites soaring overhead. The remote setting provides an excellent opportunity to observe the natural fauna of the Brecon Beacons National Park.
Public transport options directly to the starting points of these remote routes, especially with a bike, can be limited. It's recommended to research local bus services or train lines that might serve the wider Brecon Beacons area and then plan your cycling route from there, or consider driving to a suitable parking spot.
Parking is typically available at or near the starting points of the routes, such as around Usk Reservoir or in nearby villages like Trecastle. Always look for designated parking areas and be mindful of local regulations, especially in the National Park. For example, routes like the Ynysfaen Campsite – Usk Reservoir Track loop from Usk Reservoir often have parking facilities nearby.


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