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Lake Esrum (, ) is the largest lake in
Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
by water volume and the second-largest lake by surface area, after lake
Arresø Arresø () is the largest lake, by area, in Denmark. It covers 40,72 km2 (15.39 sq mi) and is situated on the island of Zealand 43 kilometers (27 miles) northwest of Copenhagen as the crow flies. Arresø is located in the northern parts of ...
. It is situated in the central part of
North Zealand North Zealand, also North Sealand (), refers to the northeastern part of the Danish island of Zealand. The Danish tourist authorities have recently introduced the term Danish Riviera to cover the area in view of its increasing importance for to ...
(the northeastern region of
Zealand Zealand ( ) is the largest and most populous islands of Denmark, island in Denmark proper (thus excluding Greenland and Disko Island, which are larger in size) at 7,031 km2 (2715 sq. mi.). Zealand had a population of 2,319,705 on 1 Januar ...
), straddling the boundaries of the municipalities
Hillerød Hillerød () is a Denmark, Danish town with a population of 36,604 (1 January 2025)Fredensborg Fredensborg () is a railway town located in Fredensborg Municipality, North Zealand, some 30 kilometres north of Copenhagen, Denmark. It is most known for Fredensborg Palace, one of the official residences of the Danish royal family. As of 1 Janua ...
,
Helsingør Helsingør ( , ; ), classically known in English as Elsinore ( ), is a coastal city in northeastern Denmark. Helsingør Municipality had a population of 63,953 on 1 January 2025, making it the 23rd most populated municipality in Denmark. Helsin ...
and
Gribskov Gribskov (Grib Forest) is Denmark's fourth largest forest, comprising c. 5,600 ha of woodland situated in northern Zealand, west and south of Lake Esrum. The forest is owned and administered by Directorate of State Forestry (Denmark), the State of ...
, some 40 kilometres north of
Copenhagen Copenhagen ( ) is the capital and most populous city of Denmark, with a population of 1.4 million in the Urban area of Copenhagen, urban area. The city is situated on the islands of Zealand and Amager, separated from Malmö, Sweden, by the ...
. The lake covers 17 km2, Its length from north to south is 8.4 km and its maximum depth is 22 m. Its principal drainage is
Esrum Å Esrum Å is the principal drainage of Lake Esrum, Denmark's second largest lake, located in Gribskov Municipality, some 50 km north of Copenhagen, Denmark. The 10-km-long stream extends from the northwestern part of the lake and flows past E ...
, a 10-km stream which passes Esrum Watermill and the remains of
Esrum Abbey Esrum Abbey, also Esrom Abbey ( or ), was the second Cistercian monastery founded in Denmark, located near Hillerød in Region Hovedstaden, on the island of Zealand (Denmark), Zealand (Sjælland), on the north side of the Esrum Sø (Lake Esrum) ...
on its way to the
Kattegat The Kattegat (; ; ) is a sea area bounded by the peninsula of Jutland in the west, the Danish straits islands of Denmark and the Baltic Sea to the south and the Swedish provinces of Bohuslän, Västergötland, Halland and Scania in Swede ...
at
Dronningmølle Dronningmølle () is a seaside resort town in Esbønderup parish, Gribskov Municipality in the Capital Region of Denmark, of eastern Denmark. Dronningmølle is located 4 kilometers west of Hornbæk, 6 kilometers east of Gilleleje and 22 kilometer ...
. The western shore of the lake is dominated by
Gribskov Gribskov (Grib Forest) is Denmark's fourth largest forest, comprising c. 5,600 ha of woodland situated in northern Zealand, west and south of Lake Esrum. The forest is owned and administered by Directorate of State Forestry (Denmark), the State of ...
, one of Denmark's largest forests, and the small town of
Nødebo Nødebo is a village located on the southwestern shores of Lake Esrum in Hillerød Municipality, North Zealand, some 40 km north of Copenhagen, Denmark. Nødebo Church, the oldest in the area, is notable for its church frescos and its ear ...
.
Fredensborg Palace Fredensborg Palace (; ) is a palace located on the eastern shore of Lake Esrum ( Danish, ''Esrum Sø'') in Fredensborg on the island of Zealand (''Sjælland'') in Denmark. It is the Danish royal family’s spring and autumn residence, and is o ...
, one of the official residences of the Danish Royal Family, with its extensive gardens, is situated on the southeast shore. Boat trips operate on the lake from Sørup, a village just south of the palace gardens.


History


Commercial fishing

Like many of the surrounding forests, Lake Esrum was originally a royal domain. It was first administrated by ''Eentekammeret'' and later by ''Frederiksborg Amtsstue'' on behalf of the Danish government. Fishing in the lake was entrusted with a fishing master (Danish: ''fiskemester'') who resided at Fiskergården, located next to Slotsmøllen at Slotssøen in Hillerød. From 1864, fishing was carried out by private citizens and from 1907, fishing rights were sold at auction. Commercial fishing continued until 1989.


Esrum canal

From the beginning of the 19th century, Lake Esrum played a role in the transport of firewood from Grib Forest to Copenhagen. From 1802 to 1805, a canal was constructed between the north end of the lake and
Dronningmølle Dronningmølle () is a seaside resort town in Esbønderup parish, Gribskov Municipality in the Capital Region of Denmark, of eastern Denmark. Dronningmølle is located 4 kilometers west of Hornbæk, 6 kilometers east of Gilleleje and 22 kilometer ...
. Here firewood was loaded onto large cargo ships and sailed to Copenhagen. The canal was 9 km long, 9 m wide and 1.5 m deep. The work was led by
Adolph von der Recke Adolf (also spelt Adolph or Adolphe, Adolfo, and when Latinised Adolphus) is a given name with German origins. The name is a compound derived from the Old High German ''Athalwolf'' (or ''Hadulf''), a composition of ''athal'', or ''adal'', meani ...
and carried out by local peasants, soldiers and forced labour workers. A
towpath A towpath is a road or trail on the bank of a river, canal, or other inland waterway. The purpose of a towpath is to allow a land vehicle, Working animal, beasts of burden, or a team of human pullers to tow a boat, often a barge. This mod ...
ran on the banks of the canal and on the western shores of lake Esrum. The timber had to pass a 4-metre crater-like ramp called ''Væltningen'', which connected the upper section of the canal to its lower part. The upper part of the canal passed two ponds. One of them, Storedam (Great Pond), was the site of a watermill which was first used as backup for the gunpowder mill in
Frederiksværk Frederiksværk is a town with a population of 12,837 (1 January 2025) in Halsnæs Municipality on Zealand in Region Hovedstaden in Denmark. History A French cannon founder, Peyrembert, received permission to build a cannon factory here. Having ...
during the English Wars and later for the manufacturing of textiles for the army. Transportation of firewood on the canal continued until 1874 and it was later used for leisure trips. It has now dried out and been covered by forest, but Væltningen and other elements are still visible in the landscape.


Sørup's washhouses

From the middle of the 19th century, the small village of Sørup on the southeastern shores of the lake was home to numerous laundries. The laundry was picked up at institutions and wealthy households in Copenhagen,
Hillerød Hillerød () is a Denmark, Danish town with a population of 36,604 (1 January 2025)Elsinore. When the industry peaked, Sørup was home to 20 laundries with some one hundred employees.


Hydrology

The water quality of lake Esrum is considered good. Since 2002, there have been a few incidences of
trematoda Trematoda is a class of flatworms known as trematodes, and commonly as flukes. They are obligate internal parasites with a complex life cycle requiring at least two hosts. The intermediate host, in which asexual reproduction occurs, is a mol ...
plaguing swimmers in the summertime every year. The trematodes are a natural part of lake Esrums' aquatic life.


Ecology

Lake Esrum have a large population of
European perch The European perch (''Perca fluviatilis''), also known as the common perch, redfin perch, big-scaled redfin, English perch, Euro perch, Eurasian perch, Eurasian river perch, Hatch, poor man's rockfish or in Anglophone parts of Europe, simply the ...
and
Northern pike The northern pike (''Esox lucius'') is a species of carnivorous fish of the genus ''Esox'' (pikes). They are commonly found in brackish water, moderately salty and fresh waters of the Northern Hemisphere (''i.e.'' holarctic in distribution). T ...
. Other species includes
European eel The European eel (''Anguilla anguilla'') is a species of eel. Their life history was a mystery for thousands of years, and mating in the wild has not yet been observed. The five stages of their development were originally thought to be differe ...
,
ruffe The ruffe (''Gymnocephalus cernua''), also known as the Eurasian ruffe or pope, is a freshwater fish found in temperate regions of Europe and northern Asia. It has been introduced into the Great Lakes of North America as an invasive species ...
,
bream Bream (, ) are species of freshwater fish belonging to a variety of genera including '' Abramis'' (e.g., ''A. brama'', the common bream), '' Ballerus'', '' Blicca'', '' Brama'', '' Chilotilapia'', '' Etelis'', '' Lepomis'', '' Gymnocranius'', ...
,
roach Roach or The Roach may refer to: Animals * Cockroach, various insect species of the order Blattodea * Common roach (''Rutilus rutilus''), a fresh and brackish water fish of the family Cyprinidae ** ''Rutilus'' or roaches, a genus of fishes * Cal ...
,
tench The tench or doctor fish (''Tinca tinca'') is a freshwater, fresh- and brackish water, brackish-water fish of the order Cypriniformes found throughout Eurasia from Western Europe including Great Britain, Britain and Ireland east into Asia as far ...
and
bleak Bleak may refer to: Fish * Species of the genus ''Alburnus'' * Some species of the genus ''Acanthobrama'' * ''Alburnoides bipunctatus'', also known as the schneider * ''Alburnoides oblongus'', Tashkent riffle bleak * ''Aphyocypris chinensis'', Chi ...
. A smaller population of
brown trout The brown trout (''Salmo trutta'') is a species of salmonid ray-finned fish and the most widely distributed species of the genus ''Salmo'', endemic to most of Europe, West Asia and parts of North Africa, and has been widely introduced globally ...
is living here, having adapted to the freshwater. The professional fishing for eel, was previously substantial, but in 1997 the annual catch had fallen to 388 kg from a mere 14 tons. Nowadays, the lake is exclusively fished by anglers. The birdlife at the lake is varied. The
common goldeneye The common goldeneye or simply goldeneye (''Bucephala clangula'') is a medium-sized sea duck of the genus ''Goldeneye (duck), Bucephala'', the goldeneyes. Its closest relative is the similar Barrow's goldeneye. The genus name is derived from th ...
was formerly a rare breeding bird in Denmark, but after a determined effort involving artificial nests, the species is almost a signature of lake Esrum. Other common birds here includes
Eurasian coot The Eurasian coot (''Fulica atra''), also known as the common coot, or Australian coot, is a member of the rail and crake bird family, the Rallidae. It is found in Europe, Asia, Australia, New Zealand and parts of North Africa. It has a slaty-bla ...
,
mallard The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa. It has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Arge ...
,
tufted duck The tufted duck (or tufted pochard) (''Aythya fuligula'') is a small diving duck with a population of nearly one million birds, found in northern Eurasia. They are partially migratory. The scientific name is derived from Ancient Greek , an unide ...
,
great crested grebe The great crested grebe (''Podiceps cristatus'') is a member of the grebe family of water birds. The bird is characterised by its distinctive appearance, featuring striking black, orange-brown, and white plumage, and elaborate courtship displa ...
and
mute swan The mute swan (''Cygnus olor'') is a species of swan and a member of the waterfowl family Anatidae. It is native to much of Eurasia, and (as a rare winter visitor) the far north of Africa. It is an introduced species in North America, home to ...
. The
reed bed A reedbed or reed bed is a natural habitat found in floodplains, waterlogged depressions and estuaries. Reedbeds are part of a succession from young reeds colonising open water or wet ground through a gradation of increasingly dry ground. As ...
s along the lake brinks, hold many swan nests and in the southern end, a colony of the
great cormorant The great cormorant (''Phalacrocorax carbo''), also known as just cormorant in Britain, as black shag or kawau in New Zealand, formerly also known as the great black cormorant across the Northern Hemisphere, the black cormorant in Australia, and ...
have found a home, with several hundreds of nests.


Protections

Lake Esrum is part of a larger 7,400 ha
Natura 2000 Natura 2000 is a network of nature protection areas in the territory of the European Union. It is made up of Special Areas of Conservation and Special Protection Areas designated under the Habitats Directive and the Birds Directive, respectiv ...
area, comprising
Gribskov Gribskov (Grib Forest) is Denmark's fourth largest forest, comprising c. 5,600 ha of woodland situated in northern Zealand, west and south of Lake Esrum. The forest is owned and administered by Directorate of State Forestry (Denmark), the State of ...
and a few smaller woodlands nearby. It is included in the Kongernes Nordsjælland National Park.


Recreation

''"Esrum Sø Bådfart"'' (Lake Esrum Boat Service) operates boat trips on the lake from Chaluphuset, a former royal
boathouse A boathouse (or a boat house) is a building especially designed for the storage of boats, normally smaller craft for sports or leisure use. describing the facilities These are typically located on open water, such as on a river. Often the boats ...
located at Sørup on the south side of Fredensborg Palace gardens. Chaluphuset is also used as a venue from special events. Esrum Sø Bådfart also operates a café in Fendrikshus, a former forest worker's house in Gribskov on the other side of the lake. The café is open Friday-Sunday and can be reached by boat or on foot or bicycle through the forest. Skipperhuset, Chaluphuset's next door neighbour, is a lunch restaurant overlooking the lake.


Cultural references

Egon (
Ove Sprogøe Ove Wendelboe Sprogøe Petersen (21 December 1919 – 14 September 2004) was a Danish actor. Life Born in Odense, his parents were Arthur and Inger Sprogøe Petersen. He married Eva Rasmussen in 1945, with whom he had three children. One of ...
) and Kjeld (
Morten Grunwald Walter Morten Grunwald (9 December 1934 – 14 November 2018) was a Danish actor, stage director and theatre manager. Early life and education He was born in Odense, Denmark, attended Odense Theatrical School in 1958, and graduated from the Roy ...
) are quarrelling with Lake Esrum as a backdrop (in Nødebo Holt) at 1:02:54 in the 1978 ''
Olsen-banden The ''Olsen Gang'' (, ) is a Denmark, Danish comedy film series created by Danish director Erik Balling and special effects expert Henning Bahs about the eponymous fictional criminal gang. The gang's leader is the criminal genius and habitual o ...
'' film ''
The Olsen Gang Sees Red ''The Olsen Gang Sees Red'' () is a 1976 Danish comedy film directed by Erik Balling and starring Ove Sprogøe, Morten Grunwald and Poul Bundgaard. The film was the eighth in the ''Olsen Gang''-series, and was selected as the Danish entry for ...
''.


References


Sources


Esrum Sø
Danish Nature Agency
Driftsplan
management plan for Lake Esrum from Naturstyrelsen (in Danish)


External links


Esrum Sø
Danish Nature Agency
Driftsplan
management plan for Lake Esrum from Naturstyrelsen (in Danish) {{DEFAULTSORT:Esrum Lakes of Zealand Fredensborg Municipality Gribskov Municipality Hillerød Municipality Natura 2000 in Denmark