- "What in Hylia's name?! That's a monster, not a horse! Sorry, but we can't board that... thing here. It might eat the other horses."
- — Stable Clerk
Stalhorse are an undead species from The Legend of Zelda: Breath of the Wild. They are born from reanimated horse skeletons, and are used as riding mounts by Stalkoblins. They are sometimes called "bone horses".
Stalhorse are a rare undead variant ("Stal") of horses that are occasionally used by Stalkoblin as riding mounts. They can be encountered by Link in a few areas of Hyrule such as Rutile Lake, N. Tabantha Snowfield or East Akkala Plains. Like Bullbos used by Bulblins in Twilight Princess, Stalhorse are not hostile towards Link when riders are killed, though they will flee from him.
Link can try to mount them, they will automatically be tamed. He can ride one just like a living horse, but like wild animals it cannot be registered at a stable. The Stable Clerk will indeed consider it as a monster and refuses to register or board it out of fear that it may eat the living horses.
It is unknown if Stalhorse actually eat their living counterparts as it may simply be fear and due to associating it with other "Stal" monsters such as Stalfos, Stalkoblin, Stalmoblin, and Stalizalfos. Other characters will also act fearful (if unarmed) or hostile (if armed) towards an approaching Stalhorse ridden by Link. They will suggest that most people fear it due to its appearance and undead nature, despite its apparent docile behavior when rider-less. Like other "Stal" enemies encountered outside areas, Stalhorse only appear at night, from 9:00 p.m. to 5:00 a.m. since they will die at sunrise.
Despite their apparent lack of digestive organs, Stalhorse can eat ingredients such as Apples, Swift Carrots and Endura Carrots. Eating Endura Carrots gives them three yellow Spurs to gallop more, but they disappear after a single use. Stalhorse cannot be stabled so their stats cannot be viewed directly, but they must have 3 stars of stamina as they can be spurred to a gallop three times. By comparing their canter speed to other horses it can also be determined they have 3 stars of speed. Their strength is unknown.
- "This skeletal horse is ridden by monsters. It was once a regular horse, but Ganon's power revived it from death. It cannot maintain its bone structure in the daytime."
- — Hyrule Compendium description
After obtaining the Camera Rune, Link can take a picture of a Stalhorse to add it to the Hyrule Compendium. Stalhorses are often called "Bone Horses" by most Hylians as and are considered by some to be a mythical creature due to their rarity. According to the Hyrule Compendium, they are "Creatures" and were once ordinary horses but Ganon's power resurrected them.
- "I wonder if bone horses are a real thing... I'd have to see it to believe it, but I really don't like cold places, so..."
- — Juannelle
If Link gets the Camera Rune, Juannelle, living at the Snowfield Stable, proposes the side quest "Stalhorse: Pictured!". She asks Link to take a picture of a Stalhorse which can be found at an enemy base north of the stable, and show it to her. She will reward Link with a Silver Rupee (100 Rupees).