4.4
(148)
567
hikers
10
hikes
Hiking around Llyn Alwen offers diverse landscapes in North Wales, characterized by a mix of forests, rivers, meadows, and rolling hills. The central feature is the Llyn Alwen reservoir, a 900-acre lake with a perimeter of about 3.1 miles (5 km). The terrain transitions between densely forested sections and open areas providing clear views of the water. The region also features the Alwen Dam, a notable point of interest.
Last updated: April 27, 2026
5.0
(1)
17
hikers
8.18km
02:12
100m
100m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.0
(1)
4
hikers
13.1km
03:36
220m
220m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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9
hikers
4.97km
01:22
80m
80m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.0
(4)
18
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5.0
(2)
5
hikers
10.0km
02:51
220m
230m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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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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Alwen Reservoir is the largest human-made lake in Wales and it makes for a lovely walk. There's a car park at its eastern end and the 6-mile (10 km) loop of the reservoir is wonderfully scenic and suitable for the whole family. The mixture of lake views, woodland and open moorland make it a real treat.
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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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The grand, ornate stone dam of Alwen Reservoir couldn't be more of a contrast to the neighbouring Llyn Brenig Dam. It's well worth taking a minute or two to take in this magnificent feat of engineering, that was completed in 1920. The reservoir here was built to provide drinking water for Liverpool and the Wirral.
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An easy route for all abilities
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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 10 hiking routes available around Llyn Alwen, catering to various preferences. These include 4 easy trails and 7 moderate options, ensuring there's something for every hiker.
The terrain around Llyn Alwen is diverse, featuring picturesque woodlands—some described as mystical, very green, and mossy—alongside rivers, meadows, and rolling hills. You'll experience transitions between densely forested sections and open spaces with clear views of the reservoir.
Yes, Llyn Alwen offers several easy routes perfect for beginners or those seeking a relaxed stroll. An example is the Alwen Dam – View of Llyn Brenig loop from Alwen Dam, which is approximately 5.0 km (3.1 miles) long and can be completed in about 1 hour 21 minutes.
Many of the trails around Llyn Alwen are circular, allowing you to explore the diverse scenery without retracing your steps. A popular option is the Alwen Dam – Alwen Reservoir loop from Alwen Dam, a moderate 8.2 km (5.1 miles) path that encircles parts of the reservoir.
As you hike, you can observe the impressive Alwen Dam, which stands 27 meters high. The reservoir itself, a 900-acre lake, is a central feature, offering expansive water views. Historically, the area also holds significance, with Bronze Age artifacts like a ring cairn and an ancient burial mound discovered during the reservoir's construction.
Yes, Llyn Alwen is a great destination for family hikes, especially with its selection of easy and moderate trails. The varied landscapes, from forests to open views of the lake, provide an engaging experience for all ages. Consider shorter, easy loops for younger children.
Llyn Alwen is generally dog-friendly, offering plenty of open spaces and trails for you and your canine companion to enjoy. However, it's always recommended to keep dogs on a lead, especially near livestock or wildlife, and to follow local signage regarding pet regulations.
Llyn Alwen offers beautiful hiking experiences throughout the year. Spring brings lush greenery and blooming flora, while autumn showcases vibrant fall colors in the diverse forests. Summer provides longer daylight hours, and even winter can be picturesque, though conditions may be colder and paths potentially muddier.
Parking is available at various points around Llyn Alwen, often near the Alwen Dam or other trailheads. These designated parking areas provide convenient access to the hiking routes.
While Llyn Alwen itself offers a tranquil, natural experience, there are amenities in nearby villages and towns. For cafes, pubs, or accommodation, you would typically need to venture a short distance from the immediate reservoir area.
The Llyn Alwen area is highly rated by the komoot community, with an average score of 4.5 stars from over 180 reviews. Hikers frequently praise the peaceful atmosphere, the diverse and ever-changing scenery, and the well-maintained paths that offer clear views of the reservoir and surrounding nature.
While Llyn Alwen doesn't feature 'difficult' graded trails, some of its moderate routes offer a good challenge due to their length and elevation changes. For instance, the Alwen Reservoir Bridge – Alwen Dam loop from Alwen Dam is 14.2 km (8.8 miles) long and takes nearly 4 hours to complete, providing a substantial workout.


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