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Routes
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South Wales
Caerphilly

Aberbargoed Grasslands National Nature Reserve

Routes
Hikes
South Wales
Caerphilly

Aberbargoed Grasslands National Nature Reserve

The best dog-friendly hikes and walks around Aberbargoed Grasslands National Nature Reserve

4.5

(125)

1,542

hikers

11

hikes

Dog friendly hiking trails around Aberbargoed Grasslands National Nature Reserve traverse a diverse landscape, characterized by vast open grasslands and panoramic views from its southwest-facing hillside in the Rhymney Valley. This area, once a spoil tip, has been transformed into a vibrant woodland park, featuring a mix of marshy grassland, wet heath, scrub, and woodland habitats. The terrain offers varied elevations, providing both gentle paths and more challenging ascents. The reserve is recognized for its ecological importance, supporting a rich…

Last updated: May 13, 2026

4.3

(3)

9

hikers

#1.

Mynydd Machen Summit – Hengoed Viaduct loop from Hengoed

23.6km

06:50

600m

600m

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Hard

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate

5.0

(4)

26

hikers

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Tips from the Community

Peter Turner
July 9, 2025, Mynydd Machen Summit

Nice ascent from Crosskeys, but watch out for very overgrown pathways on the Machen side. Great views from the top!

1

0

Great panoramic views of surrounding area.

0

0

Stop for a while and enjoy the views

1

0

Kit P
July 18, 2022, Hengoed Viaduct

The coal mining industry transformed the landscape of South Wales and one of the ways it did that was bringing about the construction of railways and, to span valleys, their accompanying viaducts. Hengoed's viaduct is vast and incredibly impressive. Thankfully, after 35 years of being completely closed, it's now a foot and cycle path, and part of the National Cycle Route 47.

2

0

Zoe Evans
March 29, 2022, Hengoed Viaduct

Maesycwmmer (Welsh: Maesycwmer) is a village and community in the centre of Caerphilly County Borough in Wales, within the historic boundaries of Monmouthshire.

1

0

Good paths with interesting sites

0

0

plenty of free parking in Machen next to the village hall and library

1

0

Mynydd Machen is a 1,188-foot (362 m) hill in South Wales which affords glorious views over Newport, Cardiff, Steep Holm, Flat Holm, Brean Down, and the Severn Estuary. The summit is marked by the rock 10 feet (3 m) northwest of the trig point.

2

0

Frequently Asked Questions

How many dog-friendly hiking trails are available in Aberbargoed Grasslands National Nature Reserve?

There are over 10 dog-friendly hiking trails available in and around Aberbargoed Grasslands National Nature Reserve. These routes cater to various fitness levels, including easy, moderate, and difficult options, ensuring there's something for every dog and owner.

Are there any easy dog-friendly walks suitable for older dogs or puppies?

Yes, there are several easy dog-friendly walks perfect for a leisurely stroll with older dogs or puppies. For example, the Sirhowy Walk loop from Cwmfelinfach is an easy 7.1 km route, and the Oak Tree – Sirhowy Walk loop from Cwmfelinfach offers a shorter 6.1 km option, both providing gentle terrain.

What kind of terrain can I expect on dog-friendly trails in Aberbargoed Grasslands?

The trails in Aberbargoed Grasslands National Nature Reserve feature diverse terrain. You'll encounter vast open grasslands, marshy areas, scrub, and woodland paths. The reserve is situated on a southwest-facing hillside, so some routes will include gentle ascents and descents, offering panoramic views of the surrounding valleys.

Are there any circular dog walks available?

Yes, many of the dog-friendly routes in the area are circular, allowing you to start and finish at the same point. Examples include the Mynydd Machen Summit – Hengoed Viaduct loop from Hengoed for a challenging long walk, or the Sirhowy Walk – Mynydd Machen Summit loop from Cwmfelinfach for a moderate option.

What should I be aware of regarding wildlife when walking my dog in the reserve?

Aberbargoed Grasslands is a Site of Special Scientific Interest (SSSI) and home to important wildlife, including the endangered Marsh Fritillary butterfly and various ground-nesting birds like meadow pipits and skylarks. To protect these species, especially during breeding seasons, it's crucial to keep your dog under close control, preferably on a lead, particularly in grassland areas. This helps preserve the delicate ecosystem.

Are there any specific rules or codes of conduct for dog walking in the National Nature Reserve?

While specific permits are not typically required for general access, it's essential to follow the Countryside Code. This includes keeping dogs under effective control, especially near livestock or wildlife, and cleaning up after your dog. The reserve's ecological importance, particularly for species like the Marsh Fritillary butterfly, means responsible dog ownership is vital to protect its biodiversity.

Can I find trails with good viewpoints for scenic dog walks?

Absolutely. The reserve is situated on a southwest-facing hillside, and many trails offer panoramic views of the Rhymney Valley and the surrounding countryside from its higher elevations. These open sections provide excellent opportunities for scenic walks with your dog.

What do other hikers say about dog-friendly trails in Aberbargoed Grasslands National Nature Reserve?

The area is highly rated by the komoot community, with an average score of 4.4 stars from over 100 ratings. Reviewers often praise the diverse landscapes, the sense of freedom in the open grasslands, and the well-maintained informal paths that make for enjoyable dog walks.

Are there any longer, more challenging dog-friendly hikes for experienced walkers?

Yes, for those seeking a more challenging adventure with their dog, the Mynydd Machen Summit – Hengoed Viaduct loop from Hengoed is a difficult 23.6 km route with significant elevation gain, offering a rewarding experience for fit dogs and their owners.

What is the best time of year to visit Aberbargoed Grasslands with my dog?

The reserve is beautiful year-round, but spring and summer offer the chance to see the abundant wildflowers and butterflies, including the Marsh Fritillary. However, these seasons also mean more wildlife activity, so keeping your dog on a lead is especially important. Autumn provides stunning colours, and winter walks can be peaceful, though paths might be muddier.

Are there any trails that feature woodland or stream sections?

Yes, beyond the open grasslands, the reserve also encompasses areas of scrub and woodland. The Twyn Tudur – Woodland Stream Trail loop from Newbridge is a moderate 12.8 km route that specifically highlights woodland and stream sections, offering a varied environment for your dog to explore.

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