4.8
(10)
349
riders
13
rides
No traffic road cycling routes around Llyn Brianne are situated in Mid Wales, within the Doethie Valley and surrounded by the Tywi Forest and Cambrian Mountains. The region is characterized by its large reservoir, Llyn Brianne, and the impressive dam, with quiet, often deserted roads winding through varied terrain. Cyclists encounter undulating roads, steep climbs, and long downhill sections amidst moorland, dense forests, and open countryside. This landscape provides a diverse setting for road cycling, offering both challenging ascents and…
Last updated: June 29, 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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Popular around Llyn Brianne
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.
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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
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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.
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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.
2
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There are 13 dedicated no-traffic road cycling routes around Llyn Brianne featured in this guide, catering to various skill levels from easy to difficult.
The Llyn Brianne area offers a diverse cycling experience with undulating roads, steep climbs, and long downhill sections. Routes can feature significant elevation gains; for example, the difficult route The Towy Bridge Inn – Llyn Brianne Dam loop from Cefn Fannog covers 68.8 km with over 1300m of ascent. You'll find everything from gentler rides to challenging circuits, including sections like the infamous Devil's Staircase with gradients up to 25%.
Yes, the routes are rich with stunning natural and man-made features. You'll encounter the spectacular Llyn Brianne Reservoir and Dam, one of the UK's tallest. Other highlights include the dense Tywi Forest, the rolling Cambrian Mountains, and unique photo opportunities like the 'red telephone box on the mountain'. There are numerous stopping points to take in the breathtaking panoramic views.
The Llyn Brianne area is surrounded by the beautiful Tywi Forest and the Cambrian Mountains, offering a mix of moorland, forests, and open countryside. You might spot diverse wildlife, including the rare red squirrel. The RSPB Gwenffrwd-Dinas Nature Reserve, known for its waterfalls and bluebells in spring, is also nearby, adding to the natural beauty.
The Llyn Brianne area is highly rated by the komoot community, with an average score of 4.7 stars. Reviewers often praise the sense of remoteness, the quiet, often deserted roads, and the 'other-worldly' cycling experience amidst stunning natural beauty and diverse terrain.
Yes, there are 3 easy routes available. For a more gentle experience, consider The Towy Bridge Inn – Rhandirmwyn Bridge loop from Rhandirmwyn, which is 27.7 km long with a manageable 229m of elevation gain, offering a pleasant ride on mostly paved surfaces.
While specific parking locations vary by route start point, the Llyn Brianne area generally offers parking facilities near popular access points to the reservoir and surrounding forests. It's advisable to check the route details on komoot for specific parking recommendations for your chosen tour.
The region is beautiful year-round, but spring and summer offer the most favorable weather conditions for cycling, with longer daylight hours and milder temperatures. Autumn provides stunning foliage. Winter cycling is possible but requires appropriate gear due to potentially colder and wetter conditions.
Yes, many of the routes in Llyn Brianne are circular, allowing you to start and end at the same point. For example, the moderate Abergwesyn Pass – Abergwesyn Valley loop from Nant yr Hwch is a 44.6 km circular route that takes you through varied landscapes.
While the Llyn Brianne area is known for its remoteness and tranquility, there are a few amenities available. Small villages and hamlets surrounding the reservoir may offer local pubs or cafes. It's always a good idea to plan your route and check for available services beforehand, especially on longer rides, as options can be sparse.
Absolutely. The Llyn Brianne area is well-known for its demanding routes. For experienced cyclists seeking a challenge, consider the difficult The Towy Bridge Inn – Llyn Brianne Dam loop from Cefn Fannog, which features over 1300 meters of climbing over 68.8 km, or the moderate Bwlch Easgair Gelli Climb – Craig-y-Fintan loop from Nant-ystalwyn with its 876m ascent over 36.2 km.


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