Top 8 Lakes around Nantglyn
Best lakes around Nantglyn are situated in Denbighshire, Wales, an area known for its moorland and significant reservoirs. The region features notable bodies of water such as Llyn Brenig and Llyn Alwen, which are integral to the local landscape. These lakes provide diverse natural features and recreational opportunities. The area's history is also reflected in archaeological findings around the reservoirs.
Best lakes around Nantglyn
- The most popular lakes is Llyn Brenig, a viewpoint that offers extensive views over a substantial reservoir. This location is a hub for outdoor activities, including walking, cycling, and watersports, and is known for its archaeological significance and wildlife.
- Another must-see spot is Llyn Brenig — East Shore Gravel Track, a trail that flanks the eastern shore of Llyn Brenig. This gravel road provides views of the reservoir and is suitable for gravel bikes, sturdy hybrids, or mountain bikes.
- Visitors also love Alwen Dam, a man-made monument and viewpoint. This grand, ornate stone dam was completed in 1920 and is a notable feat of engineering that provides drinking water.
- Nantglyn is known for its large reservoirs and natural upland lakes. These bodies of water offer a variety of landscapes to explore, from expansive man-made lakes to tranquil natural settings.
- The lakes around Nantglyn are appreciated by the komoot community, with more than 60 upvotes and 5 photos shared across the highlights.
Last updated: July 13, 2026
Llyn Brenig
Highlight • Viewpoint
The dam is fairly recent; it was begun in 1973 and finished in 1976. It maintains the flow of water to the River Dee, not to be confused with the river of the same name in Aberdeenshire.
The water supplied by this reservoir feeds into North-East Wales and North-West England, including the Liverpool area.
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Llyn Brenig — East Shore Gravel Track
Highlight (Segment) • Trail
It's a little rough in places so best on a gravel bike, sturdy hybrid or mountain bike rather than a pure road bike.
Enjoy the views as you meander around the little inlets and see what wildlife you can see across the water.
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Alwen Reservoir Wooden Bridge
Highlight • Cycleway
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View of Denbigh Moors (Mynydd Hiraethog)
Highlight • Lake
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Llyn Brenig
Highlight • Structure
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Tips from the Community
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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Stunning scenery some nice roads but watch out for sheep 🐑
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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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A long wooden bridge spans the upper reaches of the Alwen Reservoir, which features on the Two Lakes and Alwen circular cycle routes. It's absolutely covered in lichen and feels a little rickety as you ride along. Enjoy the remote lake views as you ride over this long, narrow bridge.
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A long and winding doubletrack gravel road that flanks the eastern shore of Llyn Brenig. It's a little rough in places so best on a gravel bike, sturdy hybrid or mountain bike rather than a pure road bike. Enjoy the views as you meander around the little inlets and see what wildlife you can see across the water.
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Frequently Asked Questions
What outdoor activities can I do around the lakes near Nantglyn?
The lakes around Nantglyn, particularly Llyn Brenig and Llyn Alwen, offer a wide range of outdoor activities. At Llyn Brenig, you can enjoy walking, cycling, mountain biking, fly fishing, kayaking, and sailing. There are 14 miles of shoreline trails suitable for both walking and cycling. For more detailed routes, you can explore options like the MTB Trails around Nantglyn or Gravel biking around Nantglyn guides.
Are there family-friendly options at the lakes near Nantglyn?
Yes, Llyn Brenig is particularly family-friendly, offering gentle paths suitable for walks and cycling. The visitor center at Llyn Brenig provides amenities and information, making it a comfortable base for families. The area around Alwen Dam also offers a pleasant spot for a picnic.
What historical or archaeological sites can I find near the lakes?
The area around Llyn Brenig is rich in history. During its construction, over 50 Mesolithic (early Stone Age) and Bronze Age artifacts were discovered. You can explore archaeological trails on the northwest side of the reservoir to see burial and ceremonial monuments, including a ring cairn and barrows. A visitor center at Llyn Brenig houses some of these artifacts. Additionally, the impressive Alwen Dam, completed in 1920, is a significant feat of engineering and a historical landmark.
Can I go birdwatching or see wildlife around the lakes?
Absolutely. Llyn Brenig is an excellent spot for birdwatching, with several bird hides located around the lake. It serves as a summer breeding ground for ospreys, and you might also observe other wildlife such as pine martens, red squirrels, and sand martins.
Are there specific trails for walking or cycling around the lakes?
Yes, there are numerous trails. Llyn Brenig — East Shore Gravel Track is a long, winding doubletrack gravel road perfect for cycling, offering views of the reservoir. Combined walking trails also connect Llyn Alwen with Llyn Brenig, forming a 9.5-mile route with spectacular views. The Alwen Reservoir itself features a 7.5-mile forestry track suitable for cycling, walking, or horse riding. For more options, check out the Running Trails around Nantglyn guide.
What facilities are available at the lakes, such as cafes or visitor centers?
At Llyn Brenig, you'll find a visitor center that includes a cafe, a gift shop, and an osprey exhibition. This provides convenient amenities and information for visitors exploring the area.
What is the best time to visit the lakes near Nantglyn?
The lakes are beautiful year-round, but the summer months are ideal for watersports and enjoying the full range of outdoor activities. Spring and autumn offer pleasant temperatures for walking and cycling, with the added bonus of potential osprey sightings in summer at Llyn Brenig and vibrant seasonal colors.
Are the lakes near Nantglyn dog-friendly?
While specific dog-friendly policies can vary by exact location and facility, generally, the trails and open spaces around Llyn Brenig and Llyn Alwen are suitable for dogs, provided they are kept under control, especially due to the presence of wildlife and livestock. Always check local signage for any restrictions.
What makes Llyn Alwen unique compared to Llyn Brenig?
Llyn Alwen is a natural upland lake, offering a more serene and tranquil environment compared to the larger, more activity-focused Llyn Brenig. While Llyn Brenig is a substantial reservoir with extensive facilities, Llyn Alwen provides a peaceful natural beauty on rolling moorland and is an important part of the local water system, feeding into the larger Alwen Reservoir. It also has a history as a special stage for the Wales Rally GB.
Where can I find easy walking trails around the lakes?
Both Llyn Brenig and Llyn Alwen offer easy walking trails. Llyn Brenig has gentle paths along its 14 miles of shoreline. The 7.5-mile forestry track around the Alwen Reservoir is also suitable for walking. For specific easy routes, you can look into guides like MTB Trails around Nantglyn which includes some easy-grade routes like the 'View of Alwen Reservoir – Alwen Dam loop'.
Is there parking available at the lakes?
Yes, parking is available, particularly at the visitor center at Llyn Brenig. For other areas around the lakes, designated parking spots or lay-bys may be available. It's always advisable to check specific access points for parking information before your visit.
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