4.5
(14)
371
riders
21
rides
Touring cycling around Alwen Reservoir offers routes through the Hiraethog Forest, characterized by expansive moorlands and conifer plantations. This area features the largest man-made lake in Wales, providing a car-free environment for exploration. Cyclists encounter varied terrain, from surfaced paths to forestry tracks, with views across the reservoir and towards the distant mountains of Eryri National Park. The landscape includes diverse natural features such as the Hafod Elwy Moor National Nature Reserve.
Last updated: July 8, 2026
4.0
(10)
206
riders
24.1km
02:11
290m
290m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
1
riders
48.4km
03:19
680m
680m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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43
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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.
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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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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!!
1
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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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An easy route for all the family to enjoy, although you might want to go int he warmer months of the year. It can be very wet and windy up here in the Winter.
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There are over 20 touring cycling routes around Alwen Reservoir, offering a variety of experiences. These include 2 easy routes, 9 moderate routes, and 13 difficult routes, catering to different skill levels and preferences.
The routes around Alwen Reservoir feature varied terrain, from well-surfaced paths to forestry tracks and sometimes rougher ground. You'll cycle through expansive moorlands and conifer forests, with some routes ascending onto Mynydd Hiraethog for panoramic views. While many segments are hard-standing or well-paved, some parts can be challenging, especially for gravel bikes.
Yes, there are easy routes suitable for families. For instance, the Llyn Brenig Dam – Llyn Brenig loop from Llyn Brenig Visitor Centre Cafe is an easy 13.3 km path, perfect for a relaxed family outing. The Alwen Reservoir area generally offers a car-free environment, enhancing safety for younger riders.
Cyclists can enjoy stunning views across the 900-acre Alwen Reservoir and its striking dam, which features an Italian-style valve tower. From higher points, you might even catch glimpses of the mountains of Eryri National Park (Snowdonia). The routes also traverse the Hiraethog Forest and pass through parts of the Hafod Elwy Moor National Nature Reserve, home to rare birds and Red Squirrels.
Yes, many 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 is a moderate 24.1 km shared-use trail connecting Alwen Reservoir with Llyn Brenig. Another is the Alwen Reservoir and Trail – Alwen Reservoir Wooden Bridge loop from Llyn Brenig Visitor Centre, a moderate 25.4 km route.
The touring cycling routes around Alwen Reservoir are highly rated by the komoot community, with an average score of 4.4 stars from over 10 reviews. Cyclists often praise the tranquil reservoir views, the diverse forest and moorland terrain, and the sense of immersion in nature. Many appreciate the variety of routes available for different fitness levels.
Yes, parking is generally available. The Llyn Brenig Visitor Centre, located just one mile from Alwen Reservoir's car park, serves as a common starting point and offers facilities. Specific trailheads around the reservoir also provide parking options.
The Llyn Brenig Visitor Centre, conveniently close to Alwen Reservoir, offers essential facilities including a cafe, toilets, and a gift shop. This is a great spot to refuel or take a break before or after your ride.
Yes, bike hire is available at the Llyn Brenig Visitor Centre, making it convenient if you don't bring your own touring bicycle or wish to try a different type of bike for the trails.
The Alwen Reservoir area is beautiful year-round, but spring and summer offer the most pleasant weather for touring cycling, with longer daylight hours and generally drier conditions. Autumn brings stunning foliage to the Hiraethog Forest. Always check local weather forecasts before heading out, as conditions on the moorlands can change quickly.
Absolutely. For experienced cyclists seeking a challenge, the Alwen Dam – Cairn Ben Lloyd Singletrack loop from Alwen Dam is a difficult 51.3 km route with significant elevation gain through varied forest and moorland terrain. Another demanding option is the Aled Isaf Reservoir & Llansannan loop from Llyn Brenig, a 48.4 km trail through plantations and open countryside.
While the region is generally dog-friendly, specific rules may apply to certain trails, especially those passing through nature reserves like Hafod Elwy Moor. It's always best to keep dogs on a lead, particularly around livestock and wildlife, and to check local signage for any restrictions.


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