4.6
(548)
4,797
hikers
3
hikes
Dog friendly hiking trails around Glasfynydd Forest are characterized by extensive coniferous woodlands and views towards the Black Mountains. The region features the picturesque Usk Reservoir, offering tranquil waterside paths. Terrain varies from mostly level, stoned tracks to more challenging mountain ascents, providing diverse options for hikers. These natural features contribute to Glasfynydd Forest's appeal as an International Dark Sky Reserve.
Last updated: June 27, 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.
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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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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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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Glasfynydd Forest offers a selection of three dedicated dog-friendly hiking trails, ranging from moderate to difficult, ensuring there's a suitable option for various fitness levels and experiences with your canine companion.
The terrain in Glasfynydd Forest is quite varied. You'll find extensive coniferous woodlands, offering shaded routes, as well as open moorland and paths around the picturesque Usk Reservoir. Some trails feature mostly level, stoned tracks, while others, like the challenging Fan Foel summit β Llyn y Fan Fawr loop from Usk Reservoir, involve significant ascents and varied mountain terrain.
While the komoot guide focuses on moderate to difficult routes, the wider Glasfynydd Forest area does offer easier options. For instance, the Usk Reservoir Dam loop is an easier 2.8-mile (4.5 km) path, perfect for a gentle stroll with your dog. The main trails often include sections suitable for less strenuous walks.
For experienced hikers and their dogs, the Glasfynydd Forest offers two challenging routes. The Fan Foel summit β Llyn y Fan Fawr loop from Usk Reservoir covers over 20 km with significant elevation gain, and the Llyn y Fan Fawr β Fan Foel summit loop from Fforest Fawr is an even longer, more demanding 26 km journey with over 1000m of ascent.
Yes, all the featured dog-friendly routes in this guide are circular. This includes the challenging Fan Foel summit β Llyn y Fan Fawr loop from Usk Reservoir and the moderate Fan Foel summit β Llyn y Fan Fawr loop from Moel Feity, allowing you to start and end your adventure at the same point.
Hikers and their dogs can enjoy stunning views across the Usk Reservoir and towards the majestic Black Mountains. The forest itself is characterized by vast coniferous woodlands, and the area boasts diverse habitats including grassland and moorland. The Usk Reservoir is a central and picturesque feature, providing tranquil waterside paths.
The hiking routes in Glasfynydd Forest are highly rated by the komoot community, with an average score of 4.6 stars from over 500 reviews. Hikers often praise the diverse landscapes, the sense of immersion in nature, and the well-maintained paths that make for an enjoyable experience with their dogs.
Yes, facilities are available to make your visit more comfortable. Car parking and picnic facilities can be found, notably at the northern end of the Usk Reservoir dam and at Pont'ar Wysg. Several picnic tables are also dotted along the trails, perfect for a break with your dog.
Glasfynydd Forest offers a variety of trails, some of which are suitable for families with dogs. While this guide features more challenging routes, the region research indicates easier options like the 2.8-mile Usk Reservoir Dam loop, which would be a great choice for families looking for a less strenuous walk with their canine companions.
While Glasfynydd Forest is dog-friendly, it's important to be mindful of local regulations and wildlife. Always keep your dog under control, especially in areas with livestock or ground-nesting birds. It's generally recommended to keep dogs on a lead in certain areas to protect wildlife and ensure a pleasant experience for all visitors.
Glasfynydd Forest offers enjoyable hiking opportunities year-round. Spring brings new growth and milder temperatures, while autumn showcases beautiful foliage. Summer is popular, but remember to bring plenty of water for your dog. Winter can be beautiful but may require appropriate gear for both you and your dog due to potentially colder and wetter conditions on higher ground.


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