5.0
(1)
62
riders
3
rides
Gravel biking around Usk Reservoir, situated within the Brecon Beacons National Park, offers a remote upland environment characterized by diverse landscapes. The area features extensive Glasfynydd Forest tracks, unpaved paths, and gravelly climbs, set against the backdrop of the Black Mountain. Riders can expect a mix of compacted-stone forestry tracks and forest roads, providing varied terrain for no traffic gravel bike trails. The Usk Reservoir itself is a central feature, with routes offering clear vistas of the surrounding mountains and…
Last updated: May 17, 2026
4
riders
80.2km
07:05
1,450m
1,450m
Embark on a difficult gravel biking adventure with the Llyn Brianne & The Devil's Staircase loop from Llandovery. This challenging route spans 49.9 miles (80.2 km) and features a substantial…
5.0
(1)
2
riders
77.3km
05:23
1,390m
1,390m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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56
riders
90.9km
06:14
1,660m
1,660m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Usk Reservoir
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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It was a truly stunning spot to take in the scenery from this elevated panoramic viewpoint. Highly recommended.
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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.
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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.
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An incredible stretch of road. Very isolated. Watch out for Land Rover gangs racing up to the Florida Strata road.
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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.
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Komoot features several dedicated no-traffic gravel bike trails in the Usk Reservoir area. These routes are designed to keep you away from vehicular traffic, offering a peaceful and immersive experience in the Brecon Beacons National Park.
The terrain around Usk Reservoir is varied, offering a true gravel biking experience. You'll encounter a mix of compacted-stone forestry tracks, unpaved paths, and some asphalt or paved sections. The wider area, including routes like Llyn Brianne & The Devil's Staircase loop from Llandovery, features gravelly climbs and forest roads, providing a diverse and engaging ride.
Yes, a prominent feature is the 5.4-mile (8.7 km) waymarked circular route directly around the Usk Reservoir itself. This loop is shared by cyclists and walkers and offers stunning views across the water and surrounding woodlands. For longer circular options, consider routes like View of Llyn Brianne – Llyn Brianne Dam loop from Llandovery, which provides a substantial circular journey through the wider landscape.
While the immediate reservoir loop is generally considered easy and suitable for most skill levels, many of the longer no-traffic gravel routes in the wider Usk Reservoir area are rated as difficult. For example, tours such as Llandovery Castle Ruins – Llyn Brianne Dam loop from Llandovery involve significant distances (up to 90 km) and considerable elevation gain, requiring very good fitness and experience.
The Usk Reservoir area is rich in natural beauty. You'll be cycling within the Brecon Beacons National Park, with views of the dramatic Carmarthen Fans and the distant Black Mountains (Mynydd Du). The routes often pass through Glasfynydd Forest, offering beautiful woodland scenery. The reservoir itself is a central feature, and the area is also a designated Dark Sky Discovery Site, perfect for stargazing if you're out at dusk.
The 5.4-mile (8.7 km) waymarked circular route directly around the Usk Reservoir is generally considered easy and suitable for families with good fitness levels. It consists of compacted-stone forestry tracks and tarmac, making it accessible. However, be aware that some sections can be undulating and potentially muddy when wet. Longer routes in the area tend to be more challenging and are better suited for experienced riders.
There are several small car parks available for visitors around the Usk Reservoir area, providing convenient access to the trails. These are typically located near the main access points to the forest tracks and the reservoir loop.
The Usk Reservoir area offers beautiful riding conditions throughout much of the year. Spring and autumn provide pleasant temperatures and stunning scenery with changing foliage. Summer is also excellent, but be prepared for potential crowds on the main reservoir loop. While winter riding is possible, trails can be muddy and wet, and weather conditions in the Brecon Beacons can be challenging, requiring appropriate gear and caution.
The komoot community highly rates the Usk Reservoir area, with an average score of 5.0 stars. Reviewers often praise the remote and picturesque upland environment, the spectacular panoramic views, and the quiet, traffic-free nature of the trails. The diverse terrain and the immersive experience within the Brecon Beacons National Park are frequently highlighted as key attractions.
The Usk Reservoir area is quite remote, especially on the no-traffic gravel routes. While the immediate reservoir loop doesn't have direct facilities, you'll find options in nearby towns like Llandovery, which serves as a common starting point for longer tours such as Llyn Brianne & The Devil's Staircase loop from Llandovery. It's advisable to carry sufficient water and snacks, especially on longer rides.
Absolutely! The Usk Reservoir is a fantastic base for various outdoor activities. Besides gravel biking, you can enjoy walking, birdwatching (look out for Red Kites and Ospreys), and stargazing, as it's a designated Dark Sky Discovery Site. The surrounding Glasfynydd Forest also offers many opportunities for exploration on foot.


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