Lagarfljót Worm: Iceland’s Lake Serpent and the Truth Committee

The Lagarfljót worm is a serpent said to live in a long, silty lake in eastern Iceland. Chroniclers noted a “marvel” in the water in 1345, and a 1585 map warned of a huge snake there. In 2012 a farmer filmed something moving through the ice floes, and a town council panel later argued over whether it was real.

What's Actually Verifiable

English Wikipedia's article on the Lagarfljót worm was read through its API on 11 October 2026. Two independent pages were opened too: a 2014 Reykjavík Grapevine piece on the town's “truth committee”, and a February 2012 Hoaxes.org post on the video. Older works named in Wikipedia, such as Jón Árnason's folktale collection and Gísli Oddsson's book, were not opened. Their contents here are as Wikipedia reports them.

The Lake

Lagarfljót is a glacial-fed lake near the town of Egilsstaðir, sitting below sea level, and Wikipedia describes visibility as very poor because of silt. That matters for the legend. A creature you can never see clearly is a creature that can be anything.

A Heath-Worm and a Gold Ring

The best-known story comes from Jón Árnason's collection, published in 1862 and taken from a schoolgirl in the east of Iceland in 1845. Her mother gave her a gold ring and told her the way to make it pay was to lay it under a heath-worm, which Wikipedia says is a kind of slug. She tucked it in her linen chest. A few days later the little creature had grown so big it burst the chest open.

Frightened, she threw both worm and ring into the lake. The worm kept growing, spat poison and killed people and livestock. Two Finns were hired to destroy it and fetch the gold. They managed only to pin its head and tail to the lake bottom, because an even bigger dragon lay beneath it. The story adds that when the worm showed itself, a hard season or a failed hay crop would follow.

The gold-and-slug motif is not unique to this lake. Wikipedia lists the same tale for Skorradalsvatn, Kleifarvatn and two rivers, the Hvítá and the Skaftá.

What Writers Recorded

The first entry, for 1345, is vague on purpose: humps or islands standing out of the water, no head, no tail. By 1585 the Ortelius map had turned it into a serpent. Bishop Gísli Oddsson, who died in 1638, used the Norwegian word strandvorm and wrote that people disagreed on whether it had one, two or three bends. He also blamed it for floods and for making the ground and houses shake, per Wikipedia.

A seventeenth-century poem by Stefán Ólafsson, who died in 1688, puts the gold-hoarding serpent at about 20 km long with its head and tail held to the ground. Wikipedia also records a one-humped “monster” seen in 1749 to 1750.

Modern Reports

Wikipedia lists a 1963 report from Sigurður Blöndal, head of the Icelandic Forest Service, and a 1998 report from a teacher and pupils at Hallormsstaðir School. In 1983, it says, contractors measuring depth for a telephone cable found a large shifting mass near the east shore. When they hauled the cable up it was damaged in 22 places. That one is a story told by the contractors. Wikipedia quotes their guess about what happened and gives no independent check.

The 2012 Video

In February 2012, Hjörtur Kjerúlf, a farmer, filmed something snaking through ice floes on the lake. The clip ran about 30 seconds. Hoaxes.org, writing that month, said he saw it while having coffee at home. Commenters there noted that leaves in the foreground stayed in place and that the object looked anchored.

Wikipedia reports that Miisa McKeown, a researcher based in Finland, examined the footage frame by frame. Her conclusion was that the object did not travel through the water. The motion was an illusion, and she suggested something like a frozen fishing net swung by the current.

The local authority did not take it as settled. Grapevine explains that since 1997 the municipality of Fljótsdalshérað had offered a prize of 500,000 Icelandic krónur, about US$4,400, for undeniable proof of the worm. After the 2012 clip, the council reopened the contest and appointed a thirteen-member “truth committee” of volunteers. It included councillors, a biologist, an ethnologist and a former MP. Wikipedia says the panel voted 7 to 6 to accept the video as genuine and paid the filmmaker, and that an August 2014 report found members split but with no reason to doubt the creature. The sources I opened give different timings for that vote, so treat the dates as uncertain. Critics, Wikipedia adds, saw the whole thing as a bid for monster tourism.

What Could Be Behind It

Nobody has tested the lake for a large animal, and this page does not claim any answer. A few plain possibilities fit what is written down. Silt and ice make odd shapes. A net or branch caught in a strong current can wave like a body. The 1345 “humps” could be almost anything. And a folktale about a slug that swells on gold sounds more like a story about greed than a sighting.

Why the Story Lasts

Few lake monsters come with a chancellery-style paper trail: an annal entry, a sixteenth-century map, a bishop's book, a folktale and a town council vote. Add a lake nobody can see into and you get a legend that renews itself every few decades. A sightseeing boat named Lagarfljótsormurinn has run on the lake since 1999, Wikipedia says.

For other Icelandic lore see the huldufolk, Iceland’s hidden people. For another water-monster record read what is actually documented about Loch Ness, and for an Alpine cousin of serpent tales, the Tatzelwurm.

Visiting the Region

Egilsstaðir is the nearest town. Wikipedia names Hengifoss waterfall and Hallormsstaðaskógur forest nearby. This guide has not checked current tour, boat or road conditions, so confirm locally. Glacial water is cold, so do not swim to look for the worm.

Frequently Asked Questions

What is the Lagarfljót worm?

The Lagarfljót worm, or Lagarfljótsormurinn, is a lake monster of Icelandic folklore said to live in Lagarfljót near Egilsstaðir. Reports describe a long, humped serpent, often put at around 12 m.

When was it first mentioned?

Wikipedia says the Icelandic Annals entry for 1345 is generally taken as the first mention. It describes a strange thing like humps or islands in the lake and does not use the word worm.

Where does the heath-worm story come from?

It comes from a folktale in Jón Árnason's collection of 1862. A girl put a gold ring under a heath-worm, a type of slug. The worm grew huge, and she threw it into the lake.

What is the 2012 video?

In February 2012 farmer Hjörtur Kjerúlf filmed a roughly 30-second clip of a snake-like shape moving through ice on the lake. A Finnish researcher's frame-by-frame analysis suggested the object was not moving through the water.

Did anyone officially accept the video as real?

Wikipedia says a local panel voted 7 to 6 to authenticate it. Grapevine describes a thirteen-member truth committee formed after the video. The sources I opened differ on timing, and the vote was narrow.

Has the worm ever been proven to exist?

No. No body, bones or clear photograph of a head has been reported, and the video has a plausible non-animal explanation.