Stalhorse: Pictured! is a side quest from The Legend of Zelda: Breath of the Wild. It is a quest given to Link by Juannelle at the Snowfield Stable. Obtaining the Camera Rune is a prerequisite to trigger this quest.
The objective is to take a picture of a Stalhorse which can be found in an enemy camp at the N. Tabantha Snowfield, north of the stable at night. The picture can be taken without defeating the Stalkoblin rider. Link can ride the Stalhorse back to the stable. It cannot be registered as the stable clerk Varke considers it to be a monster, not a horse and refuses to board it out of fear it will eat the other horses. The Stalhorse will die at sunrise (5:00 a.m.).