Bäckahästen (translated as the Riverhorse) is a mythological horse of Swedish folklore.
It can be described as a majestic white horse that would appear near rivers when it was foggy. Anyone who climbed onto its back would not be able to get off again, and the horse would jump into the river, drowing the rider. It is often said to be the horse of the Grim Reaper, and that its true appearance is not that of a beautiful white horse, but of a black, flaming horse.