4.5
(641)
10,488
hikers
35
hikes
Dog friendly hiking trails around Llanishen Reservoir offer diverse landscapes across 110 acres of green and blue space in North Cardiff. The area features approximately 5 km of circular paths around the reservoirs, providing waterside views and varied habitats including grassland, woodland, and scrub. While generally considered easy, some sections can be steep or muddy, especially after rain. The reservoir is also designated as a Site of Special Scientific Interest due to its ecological value.
Last updated: May 17, 2026
4.9
(21)
92
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
3
hikers
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

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5.0
(1)
4
hikers
11.0km
03:11
290m
290m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.8
(14)
65
hikers
8.95km
02:40
280m
280m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.0
(2)
24
hikers
7.64km
02:12
190m
190m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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This is a stunning walk along the ridge with clear views right across Cardiff and the Severn estuary. Highly recommend.
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Lovely woodland walk, can be a bit boggy in places. The dog absolutely loved it. Little streams for the dog to splash in.
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An iron bridge constructed in 1829 as a part of Lord Tredegar's estate.
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Craig Llysfaen is a hill in South Wales that stands tall at 265 m above sea level. The view from the top is spectacular and looks over Cardiff, Newport, and on a day with good visibility, north all the way to Pen-y-fan and the Brecon Beacons and east toward Flat Holm island and the Severn crossing.
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Cefn Onn Quarry is a former slate quarry in Cardiff. It is situated next to Coed Tranch-yr-Hebog and Wern Ddu forests. Enjoy some lovely views from here over the surrounding Vale of Glamorgan and nearby towns.
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Built in 1626 by Sir Thomas Morgan, Steward to the Earl of Pembroke, it was one of the first of the 'mock' castles to be built in Wales. In 2022 Cadw designated the castle gardens and park Grade II on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales.
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There are over 35 dog-friendly hiking trails around Llanishen Reservoir, ranging from easy strolls to more challenging routes. This variety ensures there's something suitable for every dog and owner.
Yes, the reservoir itself offers approximately 5km of circular paths that are generally easy and suitable for dogs. While specific easy routes aren't listed here, many of the paths around the reservoir are flat and well-maintained, perfect for a leisurely walk with your dog. Some sections are even accessible for wheelchairs and pushchairs, though certain areas can be steep or muddy after rain.
Llanishen Reservoir is very dog-friendly, but it's important to keep your dog under control, especially given the area's significant ecological value as a Site of Special Scientific Interest (SSSI). Always keep dogs on a lead around wildlife, particularly near bird nesting areas and where other animals like grass snakes or otters might be present. Be mindful of other visitors and ensure you clean up after your dog.
For those seeking a longer challenge, consider the difficult 21.7 km route, Cefn Onn Quarry – Coed Cefn-onn Woodland Path loop from Rhiwbina. This trail features significant elevation gain and offers a more extensive exploration of the surrounding landscape.
The trails around Llanishen Reservoir offer a diverse mix of landscapes. You'll find peaceful waterside views, open grasslands, woodlands, and scrub habitats. The area is known for its ecological richness, including diverse fungi and various bird species, providing varied scenery for you and your dog to enjoy.
Yes, a modern two-story visitor centre with a cafe is located at Llanishen Reservoir, offering spectacular views. While specific dog policies for the indoor cafe aren't detailed, many visitor centres and cafes in outdoor areas are becoming more dog-friendly, often with outdoor seating options. It's always a good idea to check directly with the venue before your visit.
The area is highly rated by the komoot community, with an average score of 4.56 stars from over 590 ratings. Reviewers often praise the peaceful waterside paths, the varied natural scenery, and the overall accessibility for walks with their dogs.
Yes, there are several moderate-difficulty routes. For example, the Cefn Onn Quarry – Coed Cefn-onn Woodland Path loop from Lisvane and Thornhill is a 10.7 km moderate hike, offering a good balance of distance and elevation for you and your dog.
Many trails in the broader area offer excellent viewpoints. For a route that includes notable views, consider the Craig Llysfaen Summit View – Coed Cefn-onn Woodland Path loop from Rudry, a 7.6 km moderate hike that will lead you to scenic spots.
Llanishen Reservoir is enjoyable year-round. Spring and autumn offer pleasant temperatures and beautiful foliage. Summer is great for longer days, but remember to bring plenty of water for your dog. Winter walks can be peaceful, but be prepared for potentially muddy conditions, especially after rain, and ensure your dog is comfortable with colder weather.
Absolutely. Many of the routes in the area feature beautiful woodland sections. The Graig Hill – Coed Cefn-onn Woodland Path loop from Lisvane, a 10.5 km moderate hike, is a great option that takes you through lovely wooded areas, perfect for dogs who enjoy sniffing around trees.
Yes, parking facilities are available at Llanishen Reservoir, making it convenient for dog walkers to access the trails. The visitor centre area provides dedicated parking, though it's always advisable to check for any potential fees or capacity during peak times.


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