Llyn Dinas
Llyn Dinas: A Tranquil Lake in the Heart of Snowdonia
Llyn Dinas is a picturesque natural lake situated near Beddgelert, in the Nant Gwynant valley of Snowdonia National Park. Stretching approximately 1.6 km in length, this serene body of water is surrounded by rolling hills, ancient woodlands, and the dramatic backdrop of Snowdon. Its peaceful atmosphere and stunning views make it a favourite spot for walking, fishing, and immersing yourself in nature.
A Lake of Legends and Reflections
Llyn Dinas is renowned for its reflective waters, which mirror the surrounding mountains, creating captivating scenery in all seasons. Whether you’re enjoying a lakeside walk, fishing from the shore, or exploring the nearby village of Beddgelert, the lake’s tranquil charm is ever-present. Legend has it that the lake was once the site of a heroic battle led by King Arthur, adding a mythical element to its natural beauty. The nearby Dinas Emrys hill is steeped in folklore, further enriching your visit to this enchanting spot.
© Brad Carr
Walks & Hikes Around Llyn Dinas
Llyn Dinas is a peaceful lake nestled near Beddgelert, offering gentle paths, riverside strolls, and routes into the heart of Snowdonia’s dramatic mountain scenery.
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Llyn Dinas Circular Walk
- 2.5 mi
- 1 hrs - 1.5 hrs
A scenic loop around the lake with wooded trails, lakeside views, and a peaceful atmosphere, perfect for families or a short morning walk.
Llyn Dinas to Sygun Copper Mine
- 2 mi
- 1 hrs - 1.5 hrs
Follow the riverside trail from Llyn Dinas to the historic Sygun Copper Mine, combining natural beauty with a touch of local heritage.
Llyn Dinas to Gelert’s Grave (Beddgelert)
- 3 mi
- 1.5 hrs - 2 hrs
This gentle route follows the Glaslyn River to the village of Beddgelert, where you can visit the legendary resting place of Gelert the hound.
Llyn Dinas to Cwm Bychan
- 4.5 mi
- 2 hrs - 3 hrs
Venture beyond the lake into the wilder Cwm Bychan valley. Expect stream crossings, rougher terrain, and stunning solitude.
Llyn Dinas to Llyn Gwynant via Watkin Path (Partial)
- 5 mi
- 2.5 hrs - 3.5 hrs
A rewarding walk linking two of Snowdonia’s most beautiful lakes with forest trails, open views, and light inclines along the lower section of the Watkin Path.
What to Know Before You Go
Llyn Dinas is relatively sheltered, but weather conditions can change quickly due to its mountainous location. Dress appropriately and bring waterproofs, especially if hiking or swimming. The lake is accessible year-round, but the best times to visit are spring and autumn when the colours are particularly vibrant.
Why We Love Llyn Dinas
Llyn Dinas perfectly captures the peaceful side of Snowdonia. Its reflective waters, framed by rugged hills, offer a tranquil escape from the busier parts of the park. Whether you’re exploring local legends at Dinas Emrys or simply enjoying a lakeside stroll, the area’s quiet beauty leaves a lasting impression. It’s a place where history and nature blend seamlessly, creating a timeless, magical atmosphere.
How to Get to Llyn Dinas
Llyn Dinas is located on the A498 between Beddgelert and Pen-y-Pass (postcode: LL55 4NH). There is a small car park at Nant Gwynant and layby parking available along the road. Public transport includes buses from Caernarfon and Porthmadog, stopping at Beddgelert and Nant Gwynant.
A Bit of Llyn Dinas History
Llyn Dinas is named after the nearby Dinas Emrys hill, which is said to have been the site of King Vortigern’s stronghold. According to legend, the red dragon (symbolising Wales) defeated the white dragon (symbolising England) here, a tale famously recounted by Geoffrey of Monmouth. The ruins on the hill date back to medieval times, adding a sense of ancient heritage to the landscape.
Keep exploring
Llyn Dinas is just one of the many enchanting lakes in Snowdonia. Ready to discover more? Check out our guides to nearby valleys, peaks, and waterside adventures!