4.8
(10)
349
riders
19
rides
Road cycling routes around Llyn Brianne traverse the dramatic landscapes of Mid Wales, encompassing parts of the Cambrian Mountains and Brecon Beacons. The region features the Llyn Brianne Reservoir, surrounded by the extensive Tywi Forest, offering a mix of challenging ascents and serene paths. Roads wind through exposed moorland, valleys, and alongside the reservoir, providing varied terrain for cyclists.
Last updated: July 5, 2026
5.0
(1)
22
riders
68.9km
04:16
1,320m
1,320m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
8
riders
44.6km
03:11
750m
750m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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9
riders
36.3km
02:30
880m
880m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5
riders
25.4km
01:50
670m
670m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
31
riders
27.7km
01:28
230m
230m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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Cwm R MTB trail is completely blocked at top end due to hundreds of wind fallen trees this winter. Please consider before as you can not navigate loop.
1
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Confronting the Devil's Staircase northbound from near Llyn Brianne reservoir is tackling one of Wales's most infamous climbs, famed for its savage steepness and remote beauty. Prepare for an immediate, brutal ascent as the narrow single-track road rears up, averaging a punishing 10-13% but hitting steep ramps well over 20%, reportedly reaching 25-30%. Feel the wild exposure of the Cambrian Mountains, with stunningly remote views as your reward for conquering this truly devilish challenge.
1
0
It was a truly stunning spot to take in the scenery from this elevated panoramic viewpoint. Highly recommended.
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It's a truly stunning ride valley mountain road and not to be missed if you are in the area.
0
0
A short climb up from the road brings you to the Dam and carpark, there is no access over the Dam itself. But you do get a good view over the spillway and valley below.
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Devil’s Staircase is a climb for mountain bike type gears and an advantage for those that can ride out of the saddle .My attempts have failed miserably,best of luck.
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Llyn Brianne offers a superb road cycling experience due to its dramatic and beautiful scenery, varied terrain, and quiet, winding roads. You'll find routes traversing the majestic Cambrian Mountains and Brecon Beacons, alongside the spectacular Llyn Brianne Reservoir and through the extensive Tywi Forest. The region provides a mix of challenging ascents and serene paths, catering to various fitness levels.
There are over 15 road cycling routes available around Llyn Brianne on komoot, ranging from easy to difficult. These routes have been explored by more than 300 road cyclists and are highly rated by the komoot community.
Yes, Llyn Brianne offers several easier road cycling options. There are 3 routes classified as easy, which often feature gently undulating paths around the reservoir with fewer sharp climbs. An example is The Towy Bridge Inn – Rhandirmwyn Bridge loop from Rhandirmwyn, which covers 27.7 km with moderate elevation gain.
For experienced cyclists seeking a challenge, Llyn Brianne offers routes with significant climbs. The infamous Devil's Staircase, with gradients up to 25%, is a notable feature in the region. One challenging route is The Towy Bridge Inn – Llyn Brianne Dam loop from Cefn Fannog, a 68.9 km difficult trail with over 1300 meters of elevation gain, passing by the impressive Llyn Brianne Dam.
Yes, many of the road cycling routes in Llyn Brianne are circular, allowing you to start and end at the same point. A popular option is a 65-mile circular route that navigates through the Cambrian Mountains and Brecon Beacons, skirting Llyn Brianne and Usk reservoirs. Another example is Abergwesyn Pass – Abergwesyn Valley loop from Nant yr Hwch, a moderate 44.6 km loop.
Road cycling routes in Llyn Brianne offer stunning views of the Llyn Brianne Reservoir and its impressive dam, which is the UK's tallest. You'll also cycle through the picturesque Tywi Forest, exposed moorland, and parts of the Cambrian Mountains and Brecon Beacons. Keep an eye out for wildlife like red kites and red squirrels, and consider visiting the Red Kite Feeding Station nearby.
The spring, summer, and early autumn months generally offer the most favorable conditions for road cycling in Llyn Brianne, with milder weather and longer daylight hours. The region's diverse scenery, from forests to moorland, provides ever-changing views throughout these seasons. Always check local weather forecasts before heading out, as conditions can change rapidly in mountainous areas.
Yes, the Llyn Brianne area is accessible with various parking areas available. Some main car parks offer facilities like toilets, making them convenient starting points for your ride. These are often located near popular access points to the reservoir and surrounding routes.
The road cycling routes in Llyn Brianne are highly rated by the komoot community, with an average score of 4.7 stars from over 9 reviews. Cyclists often praise the quiet, winding roads, the dramatic scenery of the Cambrian Mountains, and the diverse terrain that offers both challenging climbs and serene stretches.
Absolutely. The region is known for its challenging ascents. Beyond the infamous Devil's Staircase, the Abergwesyn Pass is a popular feature, offering varied terrain and stunning views. Another notable climb is the Bwlch Easgair Gelli, which is part of routes like the Bwlch Easgair Gelli Climb – Craig-y-Fintan loop from Nant-ystalwyn.
While Llyn Brianne is known for its remote and tranquil nature, some main car parks may offer facilities like mobile coffee stands. For more substantial refreshments, you might find cafes or pubs in nearby villages such as Rhandirmwyn or Tregaron, which serve as starting or ending points for some routes. It's always a good idea to plan your stops in advance.


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