Best lakes around Mawr are found in a region of Wales characterized by diverse water bodies, from natural mountain lakes to man-made reservoirs and wetland centers. The term "Mawr," meaning "big" in Welsh, often appears in the names of significant natural features in the area. This landscape offers a variety of aquatic environments, supporting different ecosystems and recreational activities. The region's lakes are set amidst varied terrain, including moorlands, valleys, and coastal areas.
Last updated: April 30, 2026
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Lovely cycle path. Nice pub on route just off of cycle path with good food but a little expensive. Route has nice views
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Nice gravel track down to the reservoir with lovely views. Track down can get muddy but good fun. Do-able on a gravel bike
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Penllergare’s iconic waterfall is a manmade feature constructed on the River Llan to provide an ornamental lake.
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Easy walking along the Eastern and Southern edges of the reservoir, courtesy of the Gower Way (a 35-mile path linking Penller Castell to Rhossili if you fancy stretching your legs a little further). Fantastic views.
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Set amongst the stunning mountain scenery of the Mawr, the Lower Lliw reservoir is surrounded by a variety of habitats including bracken, scrub, grass and woodland, supporting a variety of wildlife. If you're into birding, keep an eye out for Peregrine, Kestrel, Raven, Wheatear, Meadow Pipit, Skylark, Whinchat, Red Kite and Curlew - which have all been spotted here. There is an accessible path to the South of Lower Lliw Reservoir that will take you all the way to the Upper Reservoir. The circular path closer to the shore-line features steep steps in places.
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Great place to canoe or SUP. Organised tours can be arranged or you can self-launch, with permission.
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Cyclists need to be aware of vehicles and walkers using the road between the Lower and Upper reservoir.
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The lower reservoir is not suitable to go around. There are steep steps at one end.
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The lakes around Mawr offer diverse natural features. You can find clear, unpolluted waters supporting aquatic plants and water birds at places like Llyn Mawr (though access is restricted). The Lower Lliw Reservoir is set amidst stunning mountain scenery with varied habitats, including bracken, scrub, grass, and woodland, attracting a variety of wildlife such as Peregrine, Kestrel, and Red Kite. The WWT Llanelli Wetland Centre is a vast area of ponds, marshes, and enclosures, perfect for birdwatching, including native herons and Caribbean flamingoes.
Yes, some lakes in the broader Mawr area have historical significance. Ty Mawr Reservoir, for instance, is an artificial reservoir opened in 1908, playing a vital role in supplying water to Wrexham and Chester. Llyn Eiddew Mawr in the Rhinog mountains features old manganese workings towards its north-western corner, offering a glimpse into past industrial activity in a remote setting. Additionally, the Penllergare Waterfall is a man-made feature constructed on the River Llan to create an ornamental lake, showcasing historical landscape design.
The lakes around Mawr offer a range of outdoor activities. You can enjoy easy walks and moderate hikes, with routes like the 'From Lower Lliw Reservoir to Upper Lliw Reservoir loop' or various trails in Penllergare Valley Woods. Cycling is also popular, especially along the Swiss Valley Reservoir (Lower Lliedi Reservoir), which has a dedicated cycle path. For those interested in water sports, the Swiss Valley Reservoir is a great place for canoeing or stand-up paddleboarding. Birdwatching is a major attraction at the WWT Llanelli Wetland Centre. You can find more details on hiking routes at Hiking around Mawr and cycling routes at Road Cycling Routes around Mawr.
Yes, there are several easy walking trails. The Upper Lliw Reservoir offers easy walking along its Eastern and Southern edges as part of the Gower Way. Near the Lower Lliw Reservoir, there's an accessible path to the South that connects to the Upper Reservoir. The Erddig Estate, near Cefn Mawr, also provides extensive parkland with waymarked walks. For more options, check out Easy hikes around Mawr, which includes routes like 'Penllergare Valley Woods to Lake Side loop'.
Many lakes around Mawr are family-friendly. The Swiss Valley Reservoir (Lower Lliedi Reservoir) features a lovely cycle path suitable for families. The WWT Llanelli Wetland Centre is a fantastic family destination with plenty of birdwatching opportunities and enclosures. The Penllergare Waterfall also offers a great walk for families with plenty to see. The Erddig Estate, with its meadows, lakes, and waymarked walks, is another excellent choice for family outings.
Yes, there are accessible paths available. Specifically, to the South of Lower Lliw Reservoir, there is an accessible path that extends all the way to the Upper Reservoir. While the circular path closer to the shoreline might have steep steps, this designated accessible route ensures a smoother experience for visitors.
The best time to visit depends on your interests. Spring and summer (late spring to early autumn) are ideal for enjoying the rich biodiversity, with dragonflies, damselflies, and butterflies abundant on sunny days, especially around wetlands like Llyn Mawr. These seasons are also perfect for walking, cycling, and water sports. Autumn offers beautiful foliage, while winter can provide a tranquil experience, with occasional visitors like Whooper Swans at Llyn Mawr. Always check local weather conditions before your visit.
Visitors particularly enjoy the tranquility and rich biodiversity of the area. The easy walking paths around reservoirs like Upper Lliw Reservoir offer fantastic views. The Swiss Valley Reservoir is popular for canoeing, stand-up paddleboarding, and its scenic cycle path. Birdwatching at the WWT Llanelli Wetland Centre is a highlight, with opportunities to see diverse birdlife. The ornamental Penllergare Waterfall is also a beloved walking destination.
Yes, some locations offer facilities. There is a cafe in the car park at Upper Lliw Reservoir, though it only takes cash. Near the Swiss Valley Reservoir, there's a pub just off the cycle path with good food. The WWT Llanelli Wetland Centre has visitor facilities, including a cafe and shop, though there is an entrance charge. The Erddig Estate also provides amenities for visitors.
Yes, cycling is a popular activity around the lakes in Mawr. The Swiss Valley Reservoir (Lower Lliedi Reservoir) boasts a lovely cycle path with nice views. You can also cycle or portage your bike around the Upper Lliw Reservoir, through the forest and onto the Rhyd y Pandy Road, which is suitable for mountain or gravel bikes. The Millennium Coastal Path, which passes the WWT Llanelli Wetland Centre, is also excellent for cycling. For more cycling routes, refer to Road Cycling Routes around Mawr.
While specific dog-friendly policies can vary, many outdoor areas around the lakes are generally suitable for dogs, especially on leads. The walking trails around the Lliw Reservoirs and in Penllergare Valley Woods are popular for dog walks. Always check for local signage regarding dog access, especially in nature reserves or wetland centers, as some areas might have restrictions to protect wildlife.
The Lliw Reservoirs, including Upper Lliw Reservoir and Lower Lliw Reservoir, are set in stunning mountain scenery. They offer easy walking paths along their edges, with the Gower Way passing through. The area is rich in wildlife, with various habitats supporting birds like Peregrine, Kestrel, and Red Kite. There's an accessible path connecting the two reservoirs, and a cafe is available at the Upper Lliw Reservoir car park.


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