Llyn Padarn, Wales, United Kingdom

Lake Locations:

United Kingdom - Wales - North Wales -

Also known as:  Lake Padarn

Llyn Padarn (Lake Padarn) is a sparkling 242-acre (one square kilometer) lake nestled in the Llanberis Pass at the foot of Mount Snowdon, (Wales’ highest mountain) in the Snowdonia National Park in Gwynedd, north Wales. The lake is part of Padarn Country Park which covers 800 acres (3.2 square kilometers) and offers a wide range of water sports, lakeside picnic areas, and scenic nature trails.

Llyn Padarn is a two mile (3.2 kilometer) long glacially formed lake connected to neighboring Llyn Peris at its southeastern end. Llyn Peris forms the lower reservoir of the Dinorwig power station. In order to preserve the natural beauty of Snowdonia National Park, the power station is located deep inside the mountain Elidir Fawr. The power station is connected to a national grid substation at Pentir by cables that are buried for approximately six miles to avoid unsightly power lines and poles in the park.

Motorized water craft are not permitted on Llyn Padarn, but the “Snowdonia Star” operates regular cruises up and down the lake. For anglers, the lake boasts excellent brown trout fishing along with Arctic char, salmon and seatrout. A water sports center on the lake rents canoes, row boats and sailboats to visitors.

Padarn Country Park is located at the southeastern end of Llyn Padarn. The park offers a number of lakeside picnic areas and Coed Allt Wen, an area of rare and ancient oak trees. A number of themed nature trails wind their way through the park including a five mile scenic trail around Llyn Padarn. The park also contains a museum on the slate quarrying industry in the area.

The outflow of Llyn Padarn creates the River Rhythallt (Afon Rhythallt) which runs past the village of Brynrefail, Gwynedd. At the Pont Rhythallt bridge in the village of Llanrug, the river changes its name to Afon Seiont and eventually reaches the sea at the historic town of Caernarfon. River Rhythallt is a great paddling river with many places for fishing, sightseeing and camping along its banks.

On the southern side of Llyn Padarn lies the village of Llanberis. Llanberis is home to the Llanberis Lake Railway Station which is a stop on a one hour train tour of the area. The Railway, which opened in 1971, is a narrow gauge heritage railway, which runs for two and a half miles along the northern bank of the lake. Visitors can catch the train at Gilfach Ddu station in the Country Park and ride on the recently opened extension up to Llanberis Village, past the Welsh Slate Museum, and historic Dolbadarn Castle. The railway uses the original Padarn Railway, which from 1843 to 1961, carried slate from the Dinorwic Quarry. The locomotives used for the scenic tour were once used to haul slate wagons in and out of the quarries.

For vacation rentals and holiday cottages, the beautiful village of Llanberis offers hotels, bed & breakfasts, and a number of self-catering options for visitors of Llyn Padarn. Touring caravan and camping sites can be found in Snowdonia National Park. Covering 526,720 acres, (2,132 square kilometers), the Park is the second largest National Park in Wales. The mountains of Snowdonia are the highlight of the park with Mount Snowdon reaching 3,560 feet (1,085 meters), the highest point in Wales. Over 100 summits of varying heights and difficulties are a draw for climbers. Non-climbers can take the Snowdonia Railway, Britain’s only rack railway, to the top of Snowdonia.

For those who enjoy touring castles, the striking ruins of Dolbadarn Castle and Caernarfon Castle are just a short drive from Llyn Padarn. Standing at the mouth of the Seiont River, Caernarfon Castle is one of the most famous castles in Wales and attracts visitors from around the world. Vacation rentals, holiday cottages, and real estate for sale and rent can also be found in the royal, seaside town of Caernarfon.

Llyn Padarn and beautiful Snowdonia National Park make the perfect holiday destination for those seeking a tranquil setting surrounded by rich culture and local history. Explore ancient castles, hike majestic mountains, and enjoy some of the most beautiful scenery in the world. A visit to Llyn Padarn will be sure to delight even the most seasoned of travelers.

Things to do at Llyn Padarn

  • Vacation Rentals
  • Fishing
  • Boating
  • Sailing
  • Canoeing
  • Kayaking
  • Camping
  • Picnicking
  • Hiking
  • National Park
  • Museum
  • Ruins

Fish species found at Llyn Padarn

  • Brown Trout
  • Char
  • Salmon
  • Trout

Llyn Padarn Photo Gallery

Llyn Padarn Statistics & Helpful Links

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Lake Type: Natural Freshwater Lake, Not Dammed

Surface Area: 242 acres

Normal Elevation (Full Pond): 344 feet

Average Depth: 53 feet

Maximum Depth: 94 feet

Trophic State: Mesotrophic

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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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Lake-Area Population | LakeLubbers

This is the estimated number of people who live in a house with a view of a lake, plus those who self-describe the lake as their home, for example: "I live at Smith Mountain Lake."


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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.

Residence Time can be as short as a few days for fast-flowing small lakes, and can exceed 100 years for slow-flowing large lakes.


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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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Normal Elevation | LakeLubbers

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".

You can find many of the world's highest-elevated lakes on LakeLubbers. Lakes with the lowest elevations (known by LakeLubbers) are shown on the final page of that list.


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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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