4.6
(676)
10,944
hikers
29
hikes
Hikes around Llanishen explore a landscape of leafy parks, expansive woodlands, and reservoirs. The terrain is characterized by gentle gradients, with several streams like the Llanishen Brook and Nant Fawr running through the area. Nearby hills provide modest climbs, creating a varied landscape that combines urban green spaces with quiet, tree-lined paths.
Last updated: May 10, 2026
4.0
(1)
6
hikers
Hike a moderate 5.8-mile (9.3 km) loop around Llanishen Reservoir and Roath Park Lake, enjoying diverse scenery and waterside paths in Cardi
4.9
(21)
92
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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145
hikers
3.02km
00:46
10m
10m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.0
(2)
44
hikers
6.53km
01:55
190m
190m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
5.0
(3)
41
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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Whatever you do is don't cycle around the reservoir, got told off and abusively shouted at.
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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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Lisvane and Llanishen Reservoirs forms a vital part of the green and blue infrastructure of Cardiff. The mix of grassland, woodland, scrub and waterside habitats offers opportunities for all kinds of wildlife and nature. There are two Sites of Special Scientific Interest (SSSI) and much of the grassland and woodland outside of the SSSIs is designated as a Site of Importance for Nature Conservation (SINC). Dogs are permitted on the café balcony, car park and Grab & Go seating area only and are not permitted anywhere else on the site, including the paths. Natural Resources Wales has advised that the risk from dogs to the fungi is too great. Waxcaps are very sensitive to changes in habitat such as fluctuations in soil moisture, temperature and nitrate levels which can reduce the production of fruiting bodies. In particular, sudden changes to nitrate levels on the site – from dog urine specifically – can have a detrimental effect on the fungi. There is a fully accessible Visitor Centre with cafe, toilets, free wi-fi, room hire, equipment hire, changing rooms and other facilities include the boathouse, bird hide, education centre, nature trails and paths, bike parking/shelters and car parking.
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Enjoy a pretty stroll through the woodland surrounding Llanishen Reservoir. Well-maintained dirt paths will lead you around the forest where there is a rope swing and stream to discover, a little something for the kids to enjoy too.
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Yes, Llanishen offers several options for family outings. A particularly good choice is the Hiking loop from Lisvane, which is a short and relatively flat walk suitable for all ages. The recently reopened Lisvane and Llanishen Reservoirs also feature accessible paths, including a dedicated Story Trail designed for children.
Many trails in the Llanishen area are suitable for dogs. Black Oak Nature Reserve is a popular spot for local dog walkers. However, be aware that areas like Lisvane Reservoir are Sites of Special Scientific Interest (SSSI) with sensitive bird populations, so it's crucial to keep dogs under close control and follow local signage.
Llanishen is well-served by public transport, making it easy to access the trails. Many routes, such as the popular Llanishen Reservoir and Roath Park Lake loop, are designed to start and end at Llanishen train station. Several bus routes also serve the area, providing access to trailheads around the reservoirs and local parks.
Cefn Onn Park contains a network of woodland paths that are beautiful year-round, from the blossoms of spring to rich autumn colours. The trails vary, with some gentle walks and others involving more of a climb. For a moderately challenging exploration, consider the Cefn Onn Quarry – Coed Tranch-yr-Hebog Quarry loop, which takes you through the woods and past a former quarry.
Yes, you can find a waterfall within Roath Park, which is a key feature of the Victorian-era park's landscape. The Roath Park Waterfall – Roath Park Rose Garden loop is an easy trail that takes you right past it, along with the park's other beautiful gardens.
The area, particularly around Lisvane Reservoir, is a designated Site of Special Scientific Interest (SSSI) known for its rich biodiversity. Birdwatchers can spot overwintering tufted ducks and pochards, as well as mallards, coots, and great crested grebes. The site is also recognized for rare waxcap fungi.
There are nearly 30 curated hiking routes around Llanishen available on komoot. These range from short, easy walks perfect for an afternoon stroll to more challenging moderate hikes, ensuring there's a trail for every fitness level.
The hiking routes in Llanishen are highly regarded by the komoot community, with over 6,000 hikers having explored the area. The trails have earned an average rating of 4.6 out of 5 stars. Reviewers often praise the combination of accessible reservoir paths and quiet woodland trails.
Yes, many of the best hikes in the area are circular routes. A great example is the Cefn Onn Quarry – Coed Cefn-onn Woodland Path loop from Lisvane and Thornhill. This moderate trail offers a comprehensive tour of the park's woodlands and history over approximately 6.7 miles (10.8 km).
The Lisvane and Llanishen Reservoirs feature a modern, two-storey visitor centre with a café offering views over the water. The centre also provides access to toilets and information about the various activities available, including walking trails and watersports.
The Llanishen Reservoir is a hub for watersports. It is a designated inland bathing water for open-water swimming and also offers sailing, canoeing, kayaking, and stand-up paddleboarding. For more details on these activities, you can check the official visitor information.


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