4.6
(497)
4,241
hikers
3
hikes
Dog friendly hiking trails around Usk Reservoir are set within the Brecon Beacons National Park, featuring a large reservoir surrounded by Glasfynydd Forest. The landscape offers a mix of woodlands, open moorland, and waterside paths, with an elevation of 1,006 feet (307 meters) above sea level. Hikers can experience varied terrain and continuous views across the water towards the distant Black Mountains.
Last updated: July 8, 2026
5.0
(1)
3
hikers
20.6km
06:14
650m
650m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.
14
hikers
26.3km
08:17
1,040m
1,040m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

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5.0
(1)
2
hikers
14.7km
04:32
510m
510m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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Ideal for a lap with human and animal
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Quite a tricky path. Easier up than down I reckon. I did it with a wonky arm so donβt worry too much.
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The views down onto Llyn Y Fawr from here is pretty spectacular. This is one of the nicest places in the Brecon Beacons to walk along. Once you have put in the effort to get here, the ridge has a good footpath, there's a nice walled shelter and the views down towards the lake is pretty awesome on a good day.
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Ahhhh Llyn Y Fan Fawr, this glaciated lake is about the nicest place you can be on a hot summers day or even a cold winter's morning. It has been central to my working life in the hills for nearly forty years. It is just so perfectly locacted and makes for a good check point with groups, a rest spot, a camping spot and a perfect wild swimming spot on a hot day. Don't listen to the naysayers, this has been an iconic wild swimming spot for eons. Apart from that it will be a tad cold, it is just about one of the best swim spots in the Brecon Beacons.
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There are 3 dog-friendly hiking trails around Usk Reservoir featured in this guide. These include one moderate route and two more challenging options for experienced hikers and their dogs.
Yes, the Usk Reservoir area is well-known for its circular routes, making it ideal for dog walks where you can start and end at the same point. For a challenging circular option, consider the Fan Foel summit β Llyn y Fan Fawr loop from Usk Reservoir, which covers over 20 km. You can find details for this route here: Fan Foel summit β Llyn y Fan Fawr loop from Usk Reservoir.
The dog-friendly hikes around Usk Reservoir range from moderate to difficult. There is one moderate route, the Fan Foel summit β Llyn y Fan Fawr loop from Moel Feity, which is approximately 14.6 km long. For those seeking a greater challenge, there are two difficult routes available.
You and your dog can enjoy a diverse landscape featuring the scenic 280-acre Usk Reservoir itself, surrounded by lush Glasfynydd Forest. Trails offer a mix of charming woodlands, open moorland, and waterside paths, often providing continuous views of the water and the distant Black Mountains escarpment. The area's elevation at 1,006 feet (307 meters) above sea level contributes to these varied vistas.
Usk Reservoir offers beautiful hiking opportunities year-round. While the trails can be wet and muddy after rain, especially in autumn and winter, proper footwear is always recommended. Spring and summer bring lush greenery, while autumn offers stunning foliage. The remote location also provides excellent opportunities for stargazing on clear nights.
While Usk Reservoir is a remote location, there are picnic areas scattered throughout for visitors. For more extensive facilities like cafes or pubs, you would typically need to venture a short distance from the immediate reservoir area into nearby villages or towns.
Yes, parking is available at Usk Reservoir, making it convenient for accessing the various trails with your dog. Specific parking areas are usually signposted near popular trailheads, including spots near the dam for shorter loops.
The Usk Reservoir area is rich in wildlife. Keep an eye out for various bird species, including the majestic red kite, which is often seen soaring overhead. The diverse habitats of woodland and open moorland support a range of other local fauna.
The duration of dog walks varies depending on the route and your pace. For example, the moderate Fan Foel summit β Llyn y Fan Fawr loop from Moel Feity, at 14.6 km, typically takes around 4.5 hours. More challenging routes, like the 26.2 km Llyn y Fan Fawr β Fan Foel summit loop from Fforest Fawr, can take over 8 hours to complete.
The area is highly rated by the komoot community, with an average score of 4.64 stars. Reviewers often praise the stunning natural beauty, the peaceful and remote atmosphere, and the diverse terrain that makes for engaging walks with their dogs. The continuous views of the reservoir and the Black Mountains are frequently highlighted as a favorite aspect.
Absolutely. For experienced hikers and their dogs, there are challenging routes that offer significant elevation gain and longer distances. An example is the Llyn y Fan Fawr β Fan Foel summit loop from Fforest Fawr, which spans over 26 km with more than 1000 meters of elevation gain, providing a strenuous but rewarding adventure.


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