A view of the Mawddach Estuary on a clear spring day with woodland lining the shores.
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Wales' largest natural lake and one of the National Park's most popular attractions.

Measuring 3.5 miles long and three quarters of a mile at its widest point, Llyn Tegid is Wales’ largest natural lake. The lake is a popular place for water sports such as paddleboarding, canoeing, windsurfing and fishing.

Man takes part in water activities on Llyn Tegid
Watersports Permits
You will need to purchase a permit to participate in water sports such as paddleboarding, canoeing and rowing on Llyn Tegid.
Watersports Permits
Llyn Tegid jetty streches into the lake
Fishing Permits
A permit is required to fish at Llyn Tegid. Permits are granted by Snowdonia National Park Authority.
Fishing Permits
Llyn Tegid Webcam
See a live stream of the Llyn Tegid foreshore.
Frequently asked questions about Llyn Tegid

You can purchase a permit to participate in water sports by using the pay and display machines in the lakeside car parks.

LLyn Tegid Watersports Permits

No, overnight camping is not permitted on the lake shore or in the car parks.

More information on camping in Eryri can be found on the Camping page.

Camping in the National Park

Dogs are welcome at Llyn Tegid. Make sure to check the latest information on bringing dogs to Eryri on the Dogs page.

Dogs in the National Park

No. Barbecues are not permitted on the lake shore.

At times during the summer season, when the weather is warm and the water is still, there will be toxic blue-green algae at Llyn Tegid. Look out for green scum on the surface. Do not touch or enter the water when you see scum on the surface, and inform the lake warden as soon as possible. When blue-green algae have been seen on the lake, the information is shared on the National Park website and on signs around the lake.

More information on blue-green algae

You can access the lake from Snowdonia National Park Authority car parks. There are two car parks—one on the lake foreshore and another at Llangower.

Snowdonia National Park Authority car parks

Fishing is a popular activity in Llyn Tegid. You can fish by purchasing a fishing permit. Day, week and seasonal permits are available on the Llyn Tegid Permits page.

Llyn Tegid Fishing Permits

Welsh language lake names carved into stone
Llyn Tegid and King Tegid Foel
Some believe that Llyn Tegid was named after Tegid Foel, a cruel legendary king. The kingdom of Tegid Foel is said to have been submerged because of his evil nature.
Discover Eryri's Place Names