4.2
(256)
13,208
riders
337
rides
Road cycling routes around Llanishen Reservoir offer diverse terrain in the Cardiff area, ranging from urban connections to more rural landscapes. The region features a mix of well-paved surfaces and quiet roads, with some routes incorporating designated cycle lanes. While the immediate reservoir area is ecologically sensitive, it serves as a starting point for routes that extend into surrounding areas, including those with significant elevation gains. Cyclists can expect to encounter varied topography, from relatively flat sections to rolling hills…
Last updated: June 28, 2026
3.0
(2)
193
riders
85.2km
03:41
590m
590m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
140
riders
113km
04:59
900m
900m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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43
riders
68.2km
03:07
670m
670m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
40
riders
74.8km
03:18
650m
650m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
19
riders
92.5km
04:18
1,030m
1,030m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
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Great photo opportunity, but the area can be busy depending on the weather and it’s likely any progress on a bike would be very slow. Early mornings and evenings are good.
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Lovely path to ride on. A gentle incline and suitable for most abilities
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Some great views of the valley below once you get on the viaduct
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an interesting object on the way to the lighthouse
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Check running /operating times but a MUST to do.
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The weir spans the River Taff, which flows directly through the heart of South Wales. It's a nice place to stop and refuel with picnic benches and a peaceful atmosphere.
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Raglan castle cafe is a recommended stop, great coffee and cakes :-)
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There are over 350 road cycling routes available around Llanishen Reservoir, catering to various skill levels. This includes more than 100 easy routes, nearly 200 moderate routes, and over 50 challenging options for experienced cyclists.
Road cycling routes around Llanishen Reservoir offer a diverse mix of terrain. You'll find mostly well-paved surfaces and quiet roads, with some routes incorporating designated cycle lanes. The topography varies from relatively flat sections to rolling hills and more challenging climbs, especially on routes extending into the surrounding areas.
While the immediate reservoir paths are not for cycling, many routes originating from Llanishen Reservoir are suitable for families. These often integrate with Cardiff's urban green spaces and feature traffic-free sections or quiet roads. Look for routes described as 'easy' in the guide for options with less elevation and shorter distances.
Bike parking is available at the visitor centre and pedestrian entrances of Llanishen Reservoir. This allows you to secure your bike before or after your ride. For car parking, the visitor centre provides facilities, making it a convenient starting point for your cycling adventures.
Road cycling routes from Llanishen Reservoir offer opportunities to see various landmarks and natural features. You could cycle towards the historic Newport Transporter Bridge on the Newport Transporter Bridge – Usk Bridge loop from Llanishen, or enjoy views towards Celtic Manor on the View Over Celtic Manor – Usk Bridge loop from Llanishen. Other routes might pass by the Hengoed Viaduct or Caerphilly Castle, such as the Hengoed Viaduct – Caerphilly Castle loop from Llanishen.
The Llanishen Reservoir area is suitable for road cycling throughout much of the year. Spring and autumn offer pleasant temperatures and vibrant scenery. Summer provides longer daylight hours, while winter cycling is possible, though you should check weather conditions for potential rain or colder temperatures, as the region experiences varied weather.
Yes, there are several challenging road cycling routes with significant elevation gains. For instance, the Newport Transporter Bridge – Usk Bridge loop from Llanishen is a difficult 70.1-mile path with substantial climbing. Another option is the Gwern-Y-Steeple Climb – Llandaff Cathedral loop from Llanishen, which also features considerable elevation.
The area is highly rated by the komoot community, with an average score of 4.2 stars from over 180 reviews. Road cyclists often praise the diverse terrain, from urban connections to rural landscapes, and the variety of routes that cater to different ability levels. The connections to urban green spaces and paths alongside rivers are frequently highlighted.
Yes, the Llanishen Reservoir visitor centre, opened in summer 2023, offers a café with local produce, providing a convenient stop before or after your ride. Many routes also connect to Cardiff's urban areas, where you can find numerous cafes, pubs, and other amenities.
Absolutely. The Llanishen Reservoir area offers over 100 easy road cycling routes. An example of a more accessible route is the Ty Coch Campsite loop from Llanishen, which is 23.2 miles long and leads through varied local landscapes with relatively low elevation gain, often completed in about 1 hour 31 minutes.
Yes, many of the road cycling routes originating from Llanishen Reservoir are designed as loops, allowing you to start and finish at the same point. Examples include the View Over Celtic Manor – Usk Bridge loop from Llanishen and the Newport Transporter Bridge – Usk Bridge loop from Llanishen, providing convenient circular options.
Llanishen Reservoir offers a wide range of outdoor activities. You can enjoy walking on 5km of circular paths, explore a woodland Story trail, or access the Nant Fawr Trail. The clean waters are also ideal for stand-up paddleboarding (SUP), sailing, canoeing, kayaking, and open-water swimming. Bird hides are available for wildlife observation, and the visitor centre provides facilities and views.


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