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United Kingdom
Wales
North Wales
Gwynedd

Harlech

Top 9 Lakes around Harlech

Best lakes around Harlech are situated in Gwynedd, Wales, close to the coast and within proximity to Eryri (Snowdonia) National Park. This region features a mix of coastal landscapes and mountainous terrain, including the ancient Rhinogydd range. The area is characterized by its natural llyns and man-made reservoirs, offering diverse outdoor experiences. Harlech itself is a historic town known for its castle.

Best lakes around Harlech

  • The most popular lakes is Maentwrog Dam, a lake that was built in the 1920s for hydroelectric power. It later served as a cooling water source for a nuclear power station.
  • Another must-see spot is Llyn Hywel, a large natural lake nestled beneath the peaks of Rhinog Fach and Y Llethr. This wild location in the Rhinogydd range offers opportunities for rock hopping along its northern shore.
  • Visitors also love Llyn Mair, a Victorian decorative feature said to have been built by William Edward Oakeley for his daughter. It also began supplying hydroelectric power to Plas and other surrounding villages in 2013.
  • Harlech is known for its natural mountain lakes, artificial reservoirs, and village-side llyns. The region offers a variety of lakes to see and explore, from historic dams to remote mountain tarns.
  • The lakes around Harlech are appreciated by the komoot community, with more than 50 upvotes and over 20 photos shared by visitors.

Last updated: May 6, 2026

Maentwrog Dam

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Maentwrog Dam was built in the 1920s to provide a source of hydroelectric power for the Maentwrog power station. Later in 1965 the lake also became a source of cooling water for the Trawsyfynydd nuclear power station.

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Llyn Hywel

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This is a gorgeous lake beneath the broken, craggy slopes of Rhinog Fach and Y Llethr. It's nestled right in the heart of the ancient Rhinogydd range and is a spectacular place to explore. The path around the northern shore indulges in a spot of entertaining rock hopping – always good fun!

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Llyn Hywel

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beautiful lake

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Llyn Mair

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Llyn Mair (Mary's Lake) is a Victorian decorative feature said to have been built by William Edward Oakeley for his daughter. In addition to an extravagant gift, the lake began supplying hydroelectric power to Plas and other surrounding villages in 2013.
(Woodland Trust)

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Llyn Cwmhosan

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Fairly steep at first but manageable, good undergrowth to hold onto! Then eases off and takes you up to a small lake, good spot for your picnic.

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Popular around Harlech

Road Cycling Routes around Harlech

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Cycling around Harlech

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Clive G
September 27, 2025, Llyn Hywel

A wild and beautiful place, high between Rhinog Fach and Y Llethr

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Clive G
September 27, 2025, Llyn Hywel

Llyn Hywel is a wild and beautiful place cradled high between Rhinog fach and Y Llethr. It is famous for the huge slab that dives straight into the water on it's eastern side.

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Clive G
September 27, 2025, Llyn Cwmhosan

This little lake is not far above the pass of Bwlch Drws Ardudwy, and gives great views towards Rhinog Fawr.

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Llyn Mair (Mary's Lake) is a Victorian decorative feature said to have been built by William Edward Oakeley for his daughter. In addition to an extravagant gift, the lake began supplying hydroelectric power to Plas and other surrounding villages in 2013. (Woodland Trust)

Translated by Google

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This is a gorgeous lake beneath the broken, craggy slopes of Rhinog Fach and Y Llethr. It's nestled right in the heart of the ancient Rhinogydd range and is a spectacular place to explore. The path around the northern shore indulges in a spot of entertaining rock hopping – always good fun!

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Fairly steep at first but manageable, good undergrowth to hold onto! Then eases off and takes you up to a small lake, good spot for your picnic.

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William Cook
August 3, 2023, Llyn Hywel

A large lake, nestled under the peak of Rhinog Fach.

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William Cook
July 20, 2023, Llyn Mair

A Large artificial lake in the area of Tan-y-Bwlch.

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Frequently Asked Questions

Are there family-friendly lakes around Harlech?

Yes, several lakes in the Harlech area are suitable for families. Maentwrog Dam is listed as family-friendly, offering an easy path that can be ridden over. Trawsfynydd Village, located on the banks of its artificial llyn, is another family-friendly spot that serves as a basecamp for exploring Eryri (Snowdonia) National Park. Additionally, Llyn Mair is a Victorian decorative lake also noted as family-friendly.

What kind of natural features can I expect to see at the lakes near Harlech?

The lakes around Harlech offer a mix of natural and man-made features. You'll find natural mountain lakes like Llyn Hywel, nestled beneath the peaks of Rhinog Fach and Y Llethr, offering wild, craggy landscapes and opportunities for rock hopping. There are also artificial reservoirs such as Maentwrog Dam, built for hydroelectric power, and Llyn Mair, a decorative Victorian lake.

Are there any easy lake walks near Harlech?

Yes, for easy walks, consider the area around Maentwrog Dam, which features paths that are easy to ride over. While some mountain lakes like Llyn Hywel involve intermediate terrain and rock hopping, many areas around the larger lakes offer gentler strolls. For more structured easy walks, you can explore the easy hikes around Harlech guide.

What outdoor activities can I do near the lakes around Harlech?

The Harlech area, with its diverse lakes and proximity to Eryri (Snowdonia) National Park, offers a range of outdoor activities. You can enjoy hiking, running, and cycling. For specific routes, consider exploring the running trails around Harlech, easy hikes around Harlech, or cycling routes around Harlech.

Are there pubs or cafes near the lakes for refreshments?

Yes, if you're visiting Trawsfynydd Village, which is situated on the banks of its llyn, you'll find local amenities. The Cross Foxes pub in Trawsfynydd offers bunkhouse accommodation and serves food, making it a convenient stop for refreshments after exploring the area.

What is the best time of year to visit the lakes around Harlech?

The Harlech lakes can be enjoyed throughout the year, but the best time often depends on your preferred activities. Spring and summer offer milder weather ideal for hiking and cycling, with longer daylight hours. Autumn brings beautiful foliage, especially in areas like Coed y Brenin near Trawsfynydd Village. Winter can be wilder but offers dramatic, quiet landscapes for those prepared for colder conditions.

Are the lakes around Harlech suitable for wild swimming?

While the guide does not explicitly mention designated wild swimming spots, the region's natural mountain lakes, such as Llyn Hywel, offer wild and remote settings. Always exercise caution, research local regulations, and prioritize safety if considering wild swimming in any natural body of water.

What historical significance do some of the lakes hold?

Some lakes around Harlech have notable historical significance. Maentwrog Dam was built in the 1920s to provide hydroelectric power and later served as a cooling source for a nuclear power station. Llyn Mair is a Victorian decorative feature, said to have been built by William Edward Oakeley for his daughter.

Is there parking available at the lakes?

While specific parking details for each lake are not provided, areas like Trawsfynydd Village, being a basecamp in Eryri (Snowdonia) National Park, would typically have parking facilities for visitors. For more remote mountain lakes like Llyn Hywel, parking might be limited to nearby trailheads or designated lay-bys.

What do visitors enjoy most about the lakes around Harlech?

Visitors appreciate the diverse experiences offered by the lakes around Harlech. They enjoy the blend of historic man-made structures like Maentwrog Dam, the convenience of village-side llyns like Trawsfynydd Village, and the wild beauty of remote mountain tarns such as Llyn Hywel. The opportunities for exploring the ancient Rhinogydd range and the proximity to Eryri (Snowdonia) National Park are also highly valued.

Are there any hidden or less-known lakes worth exploring?

While the guide highlights popular spots, the region is rich with natural llyns and tarns, especially within the Rhinogydd range where Llyn Hywel is located. Exploring the trails in this ancient mountain range can lead to discovering more secluded and wild bodies of water, offering a true sense of adventure away from the main routes.

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

SnowdoniaBeddgelertBetws GarmonLlanberisLlandygaiLlanllechidWaunfawrLlanddeiniolenLlanrugLlanllyfniLlandwrogDolbenmaenBethesdaFfestiniogAberPentirGanllwydLlanfihangel-Y-PennantLlanfrothenCorrisLlanelltydDolgellauBarmouthArthogBrithdir And LlanfachrethMawddwyBryn-CrugLlanegrynLlangelyninLlanwndaPennalTrawsfynyddMaentwrogDyffryn ArdudwyTalsarnauPorthmadogPenrhyndeudraethLlanbedrLlanuwchllynLlandderfelLlanfairLlangywerCaernarfonBontnewyddLlanycilY FelinheliBangorClynnogBalaTywynBala LakeAberdovey

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