Sleipnir: The Eight-Legged Horse That Carries Odin Between Worlds

Sleipnir is Odin's eight-legged horse and, according to the Eddic poem Grímnismál, the best of all horses. Born after Loki, in the shape of a mare, lured away a giant builder's stallion, Sleipnir carries Odin across the sky, into Jötunheimr, and down the long road to Hel, crossing borders no ordinary horse can.

A Horse Won by a Trick: How Sleipnir Was Born

The story comes from Gylfaginning chapter 42 of Snorri's Prose Edda. Early in the gods' history, a builder arrives at Asgard and offers to raise a wall strong enough to keep out giants. His price is enormous: the goddess Freyja, plus the sun and the moon. On Loki's advice the gods accept, but with conditions meant to make the job impossible. One winter, no help from any man.

The builder asks to use his stallion, Svaðilfari, and Loki talks the gods into allowing it. That is the mistake. The stallion hauls boulders all night, doing twice the work of his master, and three days before summer the wall stands nearly finished. The gods, facing the loss of Freyja and the lights of the sky, turn on the one who gave the advice and promise Loki an ugly death unless he fixes it.

So Loki becomes a mare. He whinnies from the woods, Svaðilfari snaps his traces, and the two horses run all night while the builder's deadline dies. The builder flies into a giant's rage, which settles the question of what he really is, and Thor settles the bill with Mjölnir. Some time later, Snorri writes, Loki bore a gray foal with eight legs, "and this horse is the best among gods and men."

Worth saying plainly: the full birth story survives only in Snorri. Völuspá stanzas 25 and 26 allude to the broken oaths and to Thor striking the blow, but the poem never mentions the horse. Snorri is either preserving a lost tradition or connecting dots himself, and we cannot tell which.

What Sleipnir Does in the Myths

Sleipnir's job is border-crossing. In Baldrs draumar, Odin saddles him and rides down to Niflhel, past a blood-stained hound, to wake a dead seeress and question her about Baldr's nightmares. In Gylfaginning chapter 49, after Baldr's death, the god Hermóðr borrows Sleipnir for the most famous ride in the mythology: nine nights through valleys so dark he could see nothing, over the river Gjöll, and at the road's end a leap so hard over the gate of Hel that the horse cleared it with room to spare.

The horse can outrun anything in Giantland too. In Skáldskaparmál, Odin rides Sleipnir into Jötunheimr and wagers his own head that no horse there can match him. The giant Hrungnir, mounted on Gullfaxi, chases him in such fury that he does not notice he has galloped through the gates of Asgard, a pursuit that ends, eventually, with Thor's hammer breaking Hrungnir's skull in a formal duel.

Grímnismál stanza 44 fixes Sleipnir's rank in one line, listing the best of all things: Yggdrasil among trees, Skíðblaðnir among ships, and Sleipnir among horses.

Sleipnir in the Primary Sources

The references are scattered but consistent. Grímnismál stanza 44 names him best of horses. Baldrs draumar stanza 2 has Odin saddle him for the ride to the underworld. Sigrdrífumál's rune-lore stanzas even claim runes were carved on Sleipnir's teeth. In the Prose Edda, Gylfaginning chapter 42 gives the birth, chapter 49 the ride to Hel, and Skáldskaparmál the Hrungnir wager.

He also appears outside the Eddas. In Hervarar saga, Odin in disguise poses a riddle: what two beings have ten feet, three eyes, and one tail? The answer is one-eyed Odin riding eight-legged Sleipnir. The joke only works if every listener already knew the horse, which tells you how familiar the image was.

Why Does Sleipnir Have Eight Legs?

The honest answer: no source explains it. Snorri states the eight legs as fact and moves on. The poems never bother to justify them at all.

The image is older than the books, though. Two carved picture stones from the Swedish island of Gotland, from Tjängvide and Ardre, are usually dated to the eighth or ninth century and show a rider on an eight-legged horse. That is centuries before the Eddas were written down, so the eight legs were not a scribe's flourish. They were part of the picture people already carried in their heads.

Interpretations exist, and they are guesses of varying quality. Some scholars read the extra legs as pure speed, a horse doubled. Others note that a funeral bier is carried by four men, eight legs in all, and see a death-horse bearing riders to the grave. Still others point to traditions of spirit-journeys in which a special steed carries the traveler between worlds. What the myths themselves show is simpler: nearly every Sleipnir story is a crossing, to the dead, to the giants, and back.

Grani: Sleipnir's Famous Descendant

Sleipnir's line continues into the hero legends. In chapter 13 of Völsunga saga, young Sigurd goes to choose a horse and meets a long-bearded old stranger who advises him to drive the herd into the river. Every horse swims back to land except one gray colt, which the stranger says is come "from Sleipnir's kin." Sigurd names him Grani. The old man, of course, is Odin. Grani goes on to carry Sigurd through the fire to Brynhild, which is exactly the kind of impossible crossing you would expect from Sleipnir's blood.

Riding with Odin Today

Sleipnir himself is rare in modern jewelry, but his rider is everywhere. People who feel the pull of this story tend to wear Odin's other companions: the ravens Huginn and Muninn, the wolves, the spear. On two other Gotland picture stones, Stora Hammars I and Tängelgårda, an interlaced triple-triangle symbol is carved beside spear-bearing figures usually read as Odin, and those stones are the main reason the valknut is tied to Odin today. Wearing any of them is a nod to the god who kept moving between worlds, and to the horse that carried him.

FAQ: Sleipnir, Odin's Horse

Why does Sleipnir have eight legs?

No surviving source says. Snorri simply states it in Gylfaginning chapter 42, and Gotland picture stones show the eight-legged rider centuries earlier. Scholars have proposed extra speed, an echo of four pallbearers carrying a bier, or a spirit-journey steed. In the myths, the legs mostly mean one thing: Sleipnir crosses borders other horses cannot.

Who are Sleipnir's parents?

His sire is Svaðilfari, the stallion who hauled stone for the giant builder of Asgard's wall. His mother is Loki, who took the shape of a mare to lure Svaðilfari away and later gave birth to the gray, eight-legged foal. The story is told in Gylfaginning chapter 42 of the Prose Edda.

What does the name Sleipnir mean?

It is usually explained as "the slipper" or "the sliding one," from Old Norse sleipr, meaning slippery or smooth. The Eddas never gloss the name themselves, so the reading rests on etymology rather than any statement in the sources. It fits a horse famous for gliding between the worlds of gods, giants, and the dead.

Does anyone besides Odin ride Sleipnir?

Once, in the surviving stories. After Baldr's death, Odin's son Hermóðr borrows Sleipnir to ride to Hel and plead for Baldr's return, traveling nine nights through dark valleys and leaping the gate of Hel itself (Gylfaginning chapter 49). Every other recorded ride belongs to Odin.

Sources

• Poetic Edda: Grímnismál stanza 44, Baldrs draumar stanza 2, Sigrdrífumál, Völuspá stanzas 25-26. Bellows translation at sacred-texts.com.
• Prose Edda: Gylfaginning chapters 42 and 49; Skáldskaparmál (the Hrungnir episode).
• Völsunga saga chapter 13 (Grani); Hervarar saga (the Gestumblindi riddle).

Keep exploring: place Sleipnir among the Norse gods and goddesses, follow the rider himself in Odin the Wanderer, meet Sleipnir's strange siblings among Loki's children, see where the horse fits among the other creatures of Norse mythology, or shop our Odin and raven pendants.