Top 8 Lakes around Caernarfon
Best lakes around Caernarfon are found in Gwynedd, North Wales, within the Snowdonia National Park. This region is characterized by glacially formed lakes, ancient woodlands, and a rich industrial heritage. The landscapes provide opportunities for outdoor pursuits and exploration of Welsh culture. The area's geological importance is evident in its rock formations and unique ecosystems.
Best lakes around Caernarfon
- The most popular lakes is Llanberis Village and Llyn Padarn, a settlement that serves as a popular starting point for exploring Snowdon and the surrounding area. It is located directly on Llyn Padarn, one of Wales' largest natural lakes.
- Another must-see spot is Llyn Cwellyn, a natural monument and reservoir in Snowdonia National Park. It offers dramatic mountain scenery and serves as a crucial water supply for parts of Gwynedd and Anglesey.
- Visitors also love Llyn Padarn Trail, a trail offering a mix of experiences. Visitors can enjoy the busier south side with various activities or the quieter, more scenic north side.
- Caernarfon is known for its glacially formed lakes, including large, popular bodies of water like Llyn Padarn and Llyn Cwellyn, as well as smaller, more secluded lakes in the Nantlle Valley. These provide a variety of landscapes and experiences to explore.
- The lakes around Caernarfon are appreciated by the komoot community, with more than 575 upvotes and over 50 photos shared across various highlights.
Last updated: May 3, 2026
Llanberis Village and Llyn Padarn
Highlight • Settlement
Long before it was a draw to tourists and hikers, Llanberis was a slate mining town. The Dinorwig Quarry's slate tips are a stark reminder of the region’s heritage.
The village is blessed with several good outdoor gear shops and characterful places to eat and drink.
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Llyn Padarn Trail
Highlight (Segment) • Trail
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Llyn Cwellyn
Highlight (Segment) • Natural Monument
It has amazing views well worth a stop.
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Marchlyn Bach Reservoir
Highlight • Lake
The Marchlyn Bach dam and reservoir is not part of the Dinorwig HEP scheme. It is a reservoir owned by Dwr Cymru (Welsh Water).
The road in the foreground leads after a two mile climb to the HEP surge pool.
The road in background leads to Marchlyn Mawr.
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View of Llyn Padarn from Pont Pen-y-Llyn
Highlight • Viewpoint
Its absolutely stunning and well worth the ride.
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Tips from the Community
Llyn Cwellyn is a reservoir in North Wales which supplies drinking water to parts of Gwynedd and Anglesey. It lies on the Afon Gwyrfai in Nant y Betws between Moel Eilio and Mynydd Mawr in the northern part of Snowdonia National Park. It has an area of 215 acres, and is over 120 ft deep. It has amazing views well worth a stop.
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On a clear day, from this end of Llyn Padarn you’ll get an enticing view of Snowdon and other peaks. Its absolutely stunning and well worth the ride.
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Nice place. I especially recommend the ice cream at Giorgio's!
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Marchlyn Bach Reservoir The Marchlyn Bach dam and reservoir is not part of the Dinorwig HEP scheme. It is a reservoir owned by Dwr Cymru (Welsh Water). The road in the foreground leads after a two mile climb to the HEP surge pool. The road in background leads to Marchlyn Mawr.
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Great views from the bridge at the western end of Llyn Padarn. Look across the lake at the old Dinorwig slate mining and the Electric Mountain. To the right you can see over Llanberis and up onto Snowdon.
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Found this lovely back road behind the Llyn Cwellyn with great views of the Arenig Hills. Highly recommend this road rather than using the main road around the lake.
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Frequently Asked Questions
What are some of the most popular lakes to visit near Caernarfon?
Among the most popular lakes are Llyn Padarn, located near Llanberis, and Llyn Cwellyn, nestled within Snowdonia National Park. Both offer stunning scenery and a range of activities.
What kind of outdoor activities can I do at the lakes around Caernarfon?
The lakes offer diverse outdoor pursuits. At Llyn Padarn, you can enjoy swimming, canoeing, kayaking, paddleboarding, and fishing. Llynnau Mymbyr is also popular for canoeing and paddleboarding. The areas around Llyn Cwellyn and the Nantlle Valley lakes are excellent for hiking and enjoying dramatic mountain views. For more hiking options, check out the hiking guide for Caernarfon.
Are there family-friendly lakes or activities near Caernarfon?
Yes, several lakes are ideal for families. Llyn Padarn and Padarn Country Park offer easy walks, the Llanberis Lake Railway, and water activities. Llyn Cwellyn also provides accessible trails and scenic views suitable for families. You can find easy walks in the area through the easy hikes guide for Caernarfon.
What historical or cultural sites can I find near the lakes?
The region is rich in history. Near Llyn Padarn, you can explore the 13th-century Dolbadarn Castle and the National Slate Museum, reflecting the area's industrial heritage. The Nantlle Valley lakes also have a deep historical connection to the slate industry and Welsh folklore, including tales from the Mabinogi.
When is the best time of year to visit the lakes near Caernarfon?
The lakes are beautiful year-round, but summer is particularly popular for water sports and outdoor activities. Spring and autumn offer vibrant landscapes and pleasant temperatures for hiking, while winter provides a tranquil, dramatic setting for walks, especially around the quieter Nantlle Valley lakes.
What kind of wildlife can I spot at the lakes around Caernarfon?
The lakes are home to unique wildlife. Llyn Padarn and Llyn Cwellyn are notable for supporting natural populations of Arctic char, a rare fish. You might also spot otters, kingfishers, bats, and various birds. The ancient sessile oak woodland around Llyn Padarn is a Site of Special Scientific Interest, and the Nantlle Valley lakes are excellent for observing waterfowl and wading birds.
Are there any less-crowded or 'hidden gem' lakes to explore?
For a more secluded experience, consider visiting the lakes in the Nantlle Valley, such as Llyn Nantlle Uchaf and Llyn Nantlle Isaf. These pristine lakes are less frequented, offering a sense of tranquility and excellent opportunities for quiet walks and wildlife observation away from busier areas.
Can I go wild swimming in the lakes near Caernarfon?
Llyn Padarn is a popular spot for swimming, especially during the summer months. While other lakes may be suitable, always exercise caution, be aware of local regulations, and prioritize safety when considering wild swimming.
What makes Llyn Padarn a significant lake?
Llyn Padarn is one of Wales' largest natural lakes, glacially formed and of national geological importance. It's a Site of Special Scientific Interest due to its biodiversity, including Arctic char and rare plant species. Its shoreline also features historical slate quarry workings and Dolbadarn Castle.
What are the Llynnau Mymbyr known for?
Also known as the Capel Curig Lakes, Llynnau Mymbyr are renowned for their stunning views of the Snowdon Horseshoe and surrounding peaks. They are a popular spot for canoeing, paddleboarding, and dive training, often used by the national outdoor center, Plas y Brenin. Driving around them offers one of the most beautiful experiences in Eryri National Park.
Is Llyn Cwellyn suitable for fishing?
Yes, fishing permits can be purchased for Llyn Cwellyn, which is home to Arctic char and brown trout. However, be aware that certain areas along the lake are designated nature reserves where fishing is not permitted.
Are there circular walks around any of the lakes?
A well-signposted footpath encircles Llyn Padarn, providing opportunities for leisurely circular strolls with impressive landscape photography spots, including the famous 'Lone Tree'. The east side of Llyn Cwellyn also offers peaceful lakeside trails.
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