4.6
(44)
270
hikers
4
hikes
Family friendly hiking trails around Nant Irfon National Nature Reserve explore a wild and undeveloped environment in the hills above the Afon Irfon valley in Powys, Wales. The region features ancient oak woodlands, steep-sided valleys, expansive moorlands, and striking conifer forests. Elevations range from 880 feet to 1,550 feet, offering varied topography. While the immediate reserve has rough terrain, nearby waymarked trails provide options for different fitness levels.
Last updated: May 13, 2026
4.3
(3)
10
hikers
11.8km
03:24
290m
290m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.5
(4)
10
hikers
8.49km
02:33
260m
260m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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5.0
(1)
4
hikers
13.2km
03:51
360m
360m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
3.0
(1)
19
hikers
23.7km
06:47
550m
550m
Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.
5.0
(2)
10
hikers
2.59km
00:48
100m
100m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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A quick detour off the gravel road up a grassy hill, where you will find a circle of standing stones with a beautiful backdrop!
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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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An awesome road climb up the side of a hill to the top of the damn, where you can ride along the top on the road. Leads onto a gravel path suitable for gravel/MTB bikes
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The Claerwen dam took 6 years ti complete and was finished in 1952. It was given a late Victorian finsh so that it blended in with the earlier dams in the valley. It's a big one - almost twice the size of the other dams in the Elan valley and the Claerwen reservoir is almost the size of all the other reservoirs in the Elan Valley system combined.
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Llyn Brianne is a spectacular reservoir at almost 300m (990ft) above sea level. It is Wales second largest reservoir by volume and is contained by a 91m (300ft) stone-built dam, which is the largest of its kind in Europe.
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There are several family-friendly hiking routes available, with 3 moderate and 1 difficult trail listed in this guide. These trails offer a range of experiences suitable for families looking to explore the area.
The terrain around Nant Irfon National Nature Reserve is diverse, featuring ancient oak woodlands, steep-sided valleys, and expansive moorlands. While the reserve itself can be wild with rough, boggy ground, the family-friendly routes often follow established paths. Expect varied surfaces, and good, stout footwear is essential for navigating the sometimes challenging conditions.
Yes, several routes are circular, making them convenient for families. For example, the Llyn Brianne Reservoir loop from Abergwesyn is a moderate circular hike covering approximately 11.8 km. Another option is the Llyn Brianne Reservoir loop from Cefn Fannog, which is about 8.5 km long.
Families can explore a variety of natural features. The area is known for its ancient oak woodlands, which are particularly beautiful in late spring when carpeted with bluebells. The River Irfon features cascades and waterfalls in places, and a significant natural attraction is Wolf's Leap, a narrow canyon with a deep pool. Nearby, the spectacular Llyn Brianne Reservoir offers scenic views.
Yes, some routes incorporate historical elements. For instance, the Llyn Brianne Reservoir – Standing Stones loop from Cefn Fannog includes visits to ancient standing stones, adding a cultural and historical dimension to your hike. Within the wider reserve, hikers can also discover the stone ruins of Digyff, an ancient farmhouse.
Late spring is particularly beautiful when the woodland floors are covered in bluebells. Summer offers generally milder weather for exploring. However, the diverse landscape can be enjoyed year-round, though conditions can be challenging in winter. Always check local weather forecasts before heading out.
While specific parking details for every trailhead are not provided, routes often start from locations like Abergwesyn or Cefn Fannog, which typically have some parking facilities. The area is also accessible via the Abergwesyn Mountain Road, which offers access points to various trails. It's advisable to check specific route descriptions for parking recommendations.
The Nant Irfon National Nature Reserve is a wild and undeveloped environment. While many outdoor areas in Wales are dog-friendly, it's crucial to keep dogs under close control, especially due to the presence of diverse wildlife and potential livestock. Always follow the Countryside Code and check specific trail guidelines for any restrictions.
The area is highly rated by the komoot community, with an average score of 4.5 stars. Reviewers often praise the dramatic and diverse landscapes, the tranquility of the ancient oak woodlands, and the stunning views around Llyn Brianne Reservoir. The opportunity to spot diverse birdlife, including Red Kites and Buzzards, is also a highlight for many.
While most routes in this guide are moderate, the Claerwen Dam – Claerwen Dam loop from Claewen Dam is an easier option, covering approximately 2.6 km with less elevation gain. This trail is a good starting point for families with younger children or those seeking a more relaxed walk.
Given the varied and sometimes challenging terrain, good, stout footwear is essential. Layers of clothing are recommended to adapt to changing weather conditions, as well as waterproofs. Bring plenty of water, snacks, and a map or GPS device. Sun protection is also advisable, even on cloudy days.


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