4.5
(13)
358
riders
9
rides
No traffic touring cycling routes around Llyn Alwen traverse a landscape characterized by upland scenery, rolling hills, and open moorland. The region features dense forests, notably the Hiraethog Forest, and the tranquil waters of Llyn Alwen itself. Cyclists encounter varied terrain, including ancient Silurian rocks, woodland habitats, and paths along the reservoir's edge, often with views towards Snowdonia. The area also includes the Llyn Brenig reservoir, which is a Site of Special Scientific Interest.
Last updated: May 17, 2026
3.9
(9)
207
riders
24.1km
02:11
290m
290m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
43
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.0
(1)
12
riders
17.0km
01:38
160m
160m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
11
riders
Hard bike ride. Very good fitness required. You may need to push your bike for some segments of this route.
11
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Llyn Alwen
A good walk or ride. Easily achievable on a cheap MTB or a gravel bike. It's mostly gravel, which makes it a good all-weather route.
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You can head back to llyn brenig before you get to the section as a short cut, this but is not to be missed. Flows really nice, cutting through some old forest before a fun section along the lake.
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Though it was not a tough or technical ride, it did take me into territory I had never visited before and was a lovely antidote to the 'fleshpots' of Gwydir Forest or Coed-y-Brenin. Some lovely gentle singletrack, beautiful views and I didn't see another rider for the whole trip - although tbh I did set off at 08.30 on a Wednesday!!
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This bridge across the 900-acre (364 ha) Alwen Reservoir enables a beautiful and tranquil loop of the Wales' largest artificial lake. The views across the water and to the surrounding woodland and hills are lovely.
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Explore over 2500 acres of forest, moorland and lakes amid stunning upland scenery. With visitor centre, café, gift shop, osprey exhibition, adventure playground, cycle hire, mountain biking, walking trails, sailing and world class fishing to discover. Perfect cycling conditions for all ages and abilities. Hire from a wide range of bikes or bring your own ride. Enjoy a gentle family ride on an e-bike or an exhilarating mountain bike adventure.
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Llyn Brenig is a reservoir located on Denbigh Moors in North Wales. The artificial lake, which was constructed between 1973 and 1976, was created by building an embankment dam across the Afon Brenig valley. It lies at 1,200 ft (370 m) above sea level on the border between the counties of Conwy and Denbighshire. It is used to manage the flow in the River Dee as part of the River Dee regulation system.
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Llyn Brenig is a reservoir located on Denbigh Moors in North Wales. The artificial lake, which was constructed between 1973 and 1976, was created by building an embankment dam across the Afon Brenig valley. It lies at 1,200 ft above sea level on the border between the counties of Conwy and Denbighshire.
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There are 9 dedicated no-traffic touring cycling routes around Llyn Alwen featured in this guide. These routes range from easy loops suitable for families to more challenging rides for experienced cyclists, ensuring a varied experience across the region's stunning landscapes.
Yes, for an easy and family-friendly option, consider the Llyn Brenig Dam – Llyn Brenig loop from Llyn Brenig Visitor Centre Cafe. This route is approximately 13 km long with minimal elevation gain, making it ideal for a relaxed ride. The area around Llyn Brenig also offers amenities like a visitor center, cafe, and toilets, enhancing the family experience.
The no-traffic routes around Llyn Alwen offer diverse terrain, from smooth forest tracks and shoreline paths to gravel sections and non-technical singletrack. You'll cycle through open moorland, dense woodlands of the Hiraethog Forest, and along the tranquil waters of Llyn Alwen and Llyn Brenig. Some routes, like the Alwen Trail, may include rougher parts and sharp descents, while others are generally considered easy to moderate.
Yes, many of the routes are circular, allowing you to start and end at the same point. A popular option is the Two Lakes loop from Llyn Brenig visitor centre, which connects Llyn Alwen and Llyn Brenig for a continuous ride through varied scenery. The Alwen Trail itself is also a circular route around the Alwen Reservoir.
The best times for touring cycling in Llyn Alwen are generally spring, summer, and early autumn. During these seasons, the weather is typically milder, and the landscapes are vibrant. Spring brings blooming heather and gorse, while summer offers longer daylight hours. Autumn provides stunning foliage colors. Always check local weather forecasts, as conditions in the uplands can change rapidly.
Yes, dogs are generally welcome on the trails around Llyn Alwen and Llyn Brenig, but they must be kept under close control, preferably on a lead, especially in areas with livestock or ground-nesting birds. This helps protect the local wildlife and ensures a pleasant experience for all trail users. Always clean up after your dog.
Beyond the natural beauty of the lakes and moorland, you can visit the impressive Alwen Dam, a magnificent feat of engineering completed in 1920, offering picturesque views. The area is also part of the Denbigh Moors, known for its upland scenery and the Hiraethog Forest. Keep an eye out for wildlife, including rare black grouse, red squirrels, and ospreys around Llyn Brenig during summer.
Ample parking is available at the Llyn Brenig Visitor Centre, which serves as a convenient starting point for many of the routes that connect to both Llyn Brenig and Llyn Alwen. There are also smaller parking areas closer to Alwen Reservoir itself, such as near the Alwen Dam.
Yes, the Llyn Brenig Visitor Centre has a cafe where you can find refreshments, snacks, and meals. This is a great spot to refuel before or after your ride. While there are no facilities directly at Llyn Alwen, the connectivity of the trails means you're often not far from the amenities at Llyn Brenig.
The routes vary in difficulty. This guide features 1 easy route, 7 moderate routes, and 1 difficult route. For example, the Alwen Dam – Cairn Ben Lloyd Singletrack loop from Alwen Dam is considered difficult, covering over 50 km with significant elevation gain. Routes like the Alwen Reservoir and Trail – Alwen Reservoir Wooden Bridge loop from Llyn Brenig Visitor Centre are moderate, offering a good balance of distance and climb.
The area is highly rated by the komoot community, with an average score of 4.47 stars. Reviewers often praise the tranquility of the no-traffic routes, the stunning upland scenery, and the well-maintained paths that offer a true escape into nature. The combination of forest, moorland, and lakeside views is frequently highlighted as a major draw.


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