Best lakes around Maentwrog are found within the Vale of Ffestiniog, nestled in Eryri (Snowdonia) National Park. This area is characterized by its diverse natural landscape, including mountains, woodlands, and a selection of captivating lakes. Each lake offers distinct features, from tranquil waters to trails for walking and cycling. The region provides opportunities to explore natural beauty and observe local wildlife.
Last updated: May 6, 2026
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A lovely little lake (Llyn) in the shadow of Arenig Fawr, a great place for reflections when the weather is bright and calm.
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Artificially enlarged, this beautiful lake provides perfect reflections of the mountain above. Wonderfully peaceful place you will often have entirely to yourself.
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Situated just to the north of Beddgelert, and named after the nearby hill fort of Dinas Emrys, Llyn Dinas is a beautiful, peaceful lake perfect for a walk or even a swim.
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You'll find Llyn yr Adar's wild waters between the popular Cnicht, often cited as being the 'Welsh Matterhorn', and the less frequented Ysgafell Wen. The llyn is a useful navigational feature for those who've ascended Cnicht and are continuing to Moelwyns Mawr and Bach, or for those heading back to Croesor. It's also a great wild swimming spot and don't be surprised to see tents pitched by its shores either.
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A beautiful and secluded lake in the Moelwynion region. The banks of the lake are a relatively popular wild-camping spot, and the lake is a perfect spot to cool off and have a breather.
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Llyn Dinas is a large but shallow lake to the northeast of Beddgelert. The A498 road runs along its northern shore, while there are footpaths that explore its southern banks. Routes up Yr Wyddfa (Snowdon) from the mountain's southern side begin just to the northeast of the lake, including the Watkin Path, which is one of the most strenuous ways to the roof of Wales.
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Mountain lake. Plenty of space around the lake, with opportunities to find drinking water. Often used for wild camping.
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Several lakes around Maentwrog are great for families. Llyn Dinas is known for its peaceful atmosphere and offers beautiful walks. Llyn Trawsfynydd features well-maintained cycleways and footpaths around its shores, making it ideal for family cycling or walks. The area around Llyn Mair and Llyn Hafod-y-Llyn also provides pleasant woodland walks and a lakeside picnic area.
Yes, Llyn Trawsfynydd is particularly well-suited for cycling, with a new trail allowing visitors to cycle the entire perimeter of the lake. National Cycle Route 82 also leads around its eastern side. For more cycling options, you can explore the Cycling around Maentwrog guide.
The lakes offer diverse natural beauty. At Llyn Trawsfynydd, you'll find woodlands, nature reserves, wetlands, and Atlantic oakwoods, providing habitats for various animal and birdlife. Llyn Mair and Llyn Hafod-y-Llyn are part of a globally important Atlantic oakwood, home to rare mosses, liverworts, lichens, and bats. Llyn Arenig Fawr is known for its stunning reflections of the surrounding mountain scenery.
The lakes are beautiful year-round, but spring and autumn often offer pleasant temperatures for walking and cycling, along with vibrant foliage or blooming wildflowers. Summer is ideal for activities like swimming in Llyn Dinas. For photography, Llyn Arenig Fawr is particularly stunning on bright, calm days for reflections.
Yes, there are several options for easy and circular walks. The perimeter of Llyn Trawsfynydd has well-maintained footpaths. A circular walk through the woodland from the Coed Llyn Mair car park allows visitors to experience both Llyn Mair and Llyn Hafod-y-Llyn. Llyn Dinas also offers beautiful, peaceful walks along its southern banks.
Beyond enjoying the lakes themselves, the area offers excellent opportunities for various outdoor activities. You can find numerous running trails, including routes around Llyn Trawsfynydd, in the Running Trails around Maentwrog guide. Cycling and road cycling routes are also abundant; explore the Cycling around Maentwrog guide and Road Cycling Routes around Maentwrog guide for detailed options.
Yes, Llyn Dinas is known for offering opportunities for swimming, making it a popular spot for those looking to take a dip in its tranquil waters.
Many of the trails and areas around the lakes are dog-friendly, but it's always recommended to keep dogs on a lead, especially in nature reserves or areas with livestock, to protect wildlife and ensure safety. Specific rules may vary, so check local signage.
Visitors frequently praise the peaceful atmosphere and stunning natural beauty. Highlights like Llyn Dinas are cherished for their tranquility and picturesque views. The well-maintained paths around Llyn Trawsfynydd are popular for cycling and walking, while Llyn Arenig Fawr is loved for its serene reflections and quiet contemplation amidst mountain scenery.
Yes, some lakes have historical connections. Llyn Trawsfynydd is a man-made reservoir that originally served as a cooling water source for a nuclear power station. The nearby Maentwrog Dam was built in the 1920s for hydroelectric power, later also supplying cooling water to the same nuclear facility.
Yes, many of the lakes themselves offer stunning views. Llyn Dinas provides beautiful vistas of the lake with Yr Wyddfa (Snowdon) rising to the north. Llyn Arenig Fawr is renowned for its perfect reflections of the Arenig Fawr mountain, offering a serene and picturesque viewpoint.
The diverse ecosystems around Maentwrog's lakes support a variety of wildlife. Llyn Trawsfynydd, with its woodlands, nature reserves, and wetlands, is home to a rich array of animal and birdlife. The Coedydd Maentwrog National Nature Reserve, encompassing Llyn Mair and Llyn Hafod-y-Llyn, is particularly important for its rare mosses, liverworts, lichens, and various insects and bats, including the rare lesser horseshoe bat.


Still not found your perfect lake around Maentwrog? Check out the guides of these regions to see even more beautiful places.