The festival which takes place in the village is based on an actual event known as the Stonehaven Fireball Festival. It's an annual ritual drama, held on December 31st in the Aberdeenshire town of Stonehaven.
While scouting locations for the film, the Gilbey brothers used head cameras while climbing and exploring various locations. These videos appear in the end credits of the film to look like "home movies" of the films climbing group.
The village of "Anoch Mor" is actually Dingwall which is North of Inverness, the policeman says "I'm just gonna take you UP to Inverness Central police station." That is geographically incorrect. It should be "DOWN to Inverness".