Llys-y-Fran Reservoir, Wales, United Kingdom

Lake Locations:

United Kingdom - Wales - Southwest Wales -

Also known as:  Llysyfran Reservoir

Nestled at the base of the Preseli Mountains of Southwest Wales, Llys-y-Fran Reservoir is a 212-acre, (0.9 square kilometers) man-made lake within the unspoiled boundaries of 350-acre (1.4 square kilometers) Llys-y-Fran Country Park. The reservoir provides sparkling water for the community of Pembrokeshire as well as recreation for anyone visiting the lake.

Llys-y-Fran Reservoir is one of the largest game fisheries in Southwest Wales, offering an abundant mix of rainbow trout and wild brown trout. Both national and international fishing competitions have been held on the lake. Fly and bait fishing are permitted from the bank or a boat. Sailing, windsurfing, canoeing, and swimming are the main water related pastimes. Fishing boats and row boats are available for rent. A sailboat launch allows visitors with their own boat access to the tranquil lake.

A seven and a half mile (11 kilometer) path around Llys-y-Fran Reservoir provides a scenic walking or biking route with many places to stop and have a picnic and enjoy the beauty of the surrounding countryside. A variety of wildlife can be spotted around the lake to include badgers, foxes and otters. The wooded area surrounding the lake provides the perfect breeding site for sparrowhawks, woodpeckers and a number of colorful songbirds. Mountain bikes are available for rent. The lake also features a cafe, visitor’s center, gift shop, and a children’s play area.

Accommodations near the Llys-y-Fran Reservoir can be found in the nearby towns of Wolf’s Castle to the west, Llandissilio to the east, and Haverfordwest to the southwest. Self-catering vacation rentals and holiday cottages of all shapes and sizes are plentiful. Real estate for rent or purchase can also be found in the area.

The Pembrokeshire Coast National Park is just north and south of Llys-y-Fran Reservoir. Covering 240 square miles (620 square kilometers) the coastal park is a favorite destination for tourists and travelers. The scenery varies from dramatic cliff tops to isolated sandy beaches and spectacular seascapes. Small villages and seaside towns dot the landscape along with sheltered bays and inlets perfect for boating and fishing. Pembrokeshire’s sea cliffs and islands also support large breeding populations of sea birds. Seals, dolphins, and whales are also frequently spotted in the coastal waters. The Preseli Hills section of the National Park provides spectacular views to the sea. One of the most visited megalithic monuments in the United Kingdom, Pentre Ifan, dominates one of the hilltops.

Castle ruins, ancient burial sites, and incredible architecture are just a short drive from Llys-y-Fran Reservoir. Tenby, popular since Victorian times, is a busy seaside resort with large sandy beaches and medieval walls. From Tenby, visitors can take a boat to Caldey Island, home to monks for over a thousand years. Although the monastery is closed to visitors, you can explore the island. The ruins of an old church can be found along the road to a lighthouse. Other attractions include Carew Castle near Milford Haven which has extensive ruins for exploration. The busy town of Pembroke also boasts a large castle, medieval town walls, and several museums. The hillside town of St. David’s is famous for its ruined Bishop’s Palace.

Llys-y-Fran Reservoir and the Southwest Wales region is an area of incredible natural beauty, with a spectacular coastline in the south and endless green hills and gardens in the north. Sandy secluded beaches, ancient castle ruins, and charming seaside towns combine to offer the perfect holiday or vacation destination.

Things to do at Llys-y-Fran Reservoir

  • Vacation Rentals
  • Fishing
  • Boating
  • Sailing
  • Swimming
  • Beach
  • Canoeing
  • Picnicking
  • Biking
  • Wildlife Viewing
  • Birding
  • National Park
  • Museum
  • Ruins

Fish species found at Llys-y-Fran Reservoir

  • Brown Trout
  • Rainbow Trout
  • Trout

Llys-y-Fran Reservoir Photo Gallery

    Llys-y-Fran Reservoir Statistics & Helpful Links

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    Lake Type: Artificial Reservoir, Dammed

    Water Level Control: Dwr Cymru/Welsh Water

    Surface Area: 212 acres

    Normal Elevation (Full Pond): 377 feet

    Completion Year: 1972

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    Trophic State | LakeLubbers

    Trophic State measures the level of algae and nutrients in a lake.

    An oligotrophic lake is very clear (blue in color) and does not support much plant or fish life. A hyper-oligotrophic lake is the clearest of all lakes, and is nearly devoid of plants and fish.

    A mesotrophic lake is slightly green and supports a moderate degree of plant and fish life. A lake's most desired trophic state is generally this mid-point - the mesotrophic state.

    A eutrophic lake is somewhat murky and supports a large amount of plant and fish life. A hypereutrophic lake is clouded with algae, plant life, and fish life. A eutrophic or hyper-eutrophic lake can be difficult to navigate by boat - and is often an unpleasant place to swim.

    The use of phosphorus-rich and nitrogen-rich fertilizer on lawns and golf courses surrounding a lake can cause it to become eutrophic or hypereutrophic.


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    Catchment or Drainage Area | LakeLubbers

    This is the surrounding area that drains into a lake, including land, rivers and their tributaries. This is also known as the lake's "catchment basin".

    Small lakes at the highest peaks of mountains have small drainage areas. The world's oceans have the largest drainage areas.


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    Water Residence Time | LakeLubbers

    This is the estimated time that it takes for an amount of water equal to the entire volume of a lake to flow out of - or evaporate from - the lake.

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    Completion Year | LakeLubbers

    This is the year that a reservoir was first filled to the reservoir's normal elevation - or the year that a natural lake was first dammed. A large reservoir can take more than a year to fill after its dam is first closed.

    The Grand Anicut in southern India is generally considered the world's oldest dam that still operates. Grand Anicut was constructed in the second century BC. It now impounds an irrigation network that includes roughly one million acres.

    You can find many of the the world's newest reservoirs on LakeLubbers. Many of the world's oldest reservoirs appear on the last page of that list.


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    Water Volume | LakeLubbers

    This is the estimated volume of water that a lake contains -- measured at the lake's normal elevation. By this measure, the world's largest freshwater lake is Siberia's Lake Baikal.

    You can find many of the the world's largest lakes (by water volume) on LakeLubbers.

    Water Volume can be measured in acre-feet, in cubic miles, or in cubic kilometers. One acre-foot is the amount of water needed to cover one acre (43,560 square feet) to a depth of one foot. One cubic mile equals 3,379,200 acre-feet. One cubic kilometer equals 810,713 acre-feet.

    1 acre-foot is equal to 325,851 US gallons. Siberia's Lake Baikal contains about 6,276,367,740,000,000 gallons of freshwater - nearly 1 million gallons for every living person on earth.

    The other - and more widely used - measure of a lake's size is the lake's surface acreage. By that measure, the world's largest freshwater lake is North America's Lake Superior.


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    Maximum Depth | LakeLubbers

    This is the estimated greatest depth of the water in a lake -- measured at the lake's normal elevation. The world's deepest lake is Siberia's Lake Baikal; that lake's maximum depth is estimated at 5,314 feet.

    You can find many of the the world's deepest lakes on LakeLubbers. If you select the last page of that list, you will find the (maximum depth of) the shallowest lakes in our database.


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    Average Depth | LakeLubbers

    This is the estimated average depth of the water in a lake -- measured at the lake's normal elevation. If the water volume and surface area of a lake are known, an estimate of the lake's average depth can be calculated:

    Water volume ÷ Surface Area = Average Depth

    Example: 1,000,000 acre-feet ÷ 20,000 acres = 50 feet average depth


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    Maximum Elevation | LakeLubbers

    This is a lake's highest water level, measured by the lake's surface distance above sea level, that can occur during flooding. A lake's highest possible maximum elevation is usually the top of the lake's dam or spillway.

    At lakes that include residential development, government regulations usually forbid the construction of homes below a lake's maximum elevation.


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    Minimum Elevation | LakeLubbers

    This is a lake's lowest water level, measured by the lake's surface distance above sea level, that can be reasonably expected to occur. Low lake levels can occur due to deliberate seasonal draw downs for irrigation or impending snow melt, reduced water inflows, drought and evaporation, residential or commercial water demands, and hydropower generation.

    Some lakes' minimum and maximum elevations are virtually the same. Lakes that generate hydropower may vary by several feet - according to power demand. Lakes whose primary purpose is to prevent flooding can seasonally vary by 100 feet or more.

    When some lakes reach their minimum elevation, their boat ramps may not be long enough to permit boat access - and boats docked on shallow parts of the lake may end up on dry ground. In those cases, kayakers and shore-based anglers may be among the few happy recreational users of the lake.


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    This is a lake's normal water level, measured by the lake's surface distance above sea level. For a reservoir, this water level is also known as "full pond" or "full pool".

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    Shoreline Length | LakeLubbers

    This is the length of the exterior shoreline around a lake - measured at the lake's normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal.

    A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.

    When known, the shoreline miles that we report in our statistics include only the lake's exterior shoreline, and exclude the shorelines of islands located within a lake's boundaries. In lakes with many islands, those islands' combined shorelines may exceed a lake's exterior shoreline.

    You can find many of the world's longest-shoreline lakes on Lakelubbers.


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    Surface Area | LakeLubbers

    This is the area (acreage, square kilometers, etc.) of the top surface area of a lake - measured at a lake's normal elevation. The surface area can be considerably smaller or larger when lake levels are lower or higher than normal. North America's Lake Superior is the world's largest freshwater lake by this measure.

    The other measure of a lake's size is the lake's water volume. By that measure, the world's largest freshwater lake is Lake Baikal in Siberia.

    You can find many of the world's largest lakes (acres) on Lakelubbers. There is no widely-accepted minimum surface area that defines a lake. What Lakelubbers describes as a lake, you might call a pond. The smallest lake that Lakelubbers currently includes is Hawaii's 2-acre Lake Waiau.


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    Water Level Control | LakeLubbers

    This is the organization that controls water releases or outflows from the lake or reservoir. In the USA, this is often the US Army Corps of Engineers, a power company, a municipal water system, an irrigation district, or a paper manufacturing company. In the case of private or gated lakes, a homeowners' association may be the lake's controlling authority.

    Many lakes cross borders, including North America's Great Lakes. The control of such lakes and their coveted freshwater may be amicably shared - or hotly disputed.

    "Water wars" continue at many lakes as growing populations and crop irrigation needs compete for the freshwater that lakes contain.


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    Lake Type | LakeLubbers

    There are 3 basic types of lakes that are currently included on LakeLubbers. 2 types may be dammed or not dammed, producing 5 classifications.

    - A Reservoir is a man-made freshwater lake that is usually created by damming rivers.

    - A Natural Freshwater Lake occurs naturally - often by glacial activity - and has a salinity of less than 30 parts per thousand. It may be dammed to produce electricity or for other reasons.

    - A Natural Saltwater Lake occurs naturally and has a salinity of more than 30 parts per thousand (ppt). It may be dammed.

    "Brackish" water may be categorized as freshwater or saltwater, depending on its salt content (salinity). Oligohaline water has less than 15 ppt of salt. Mesohaline water has 15-29 ppt. Polyhaline has 30-335 ppt.


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