Wrong Turn 4

An isolated sanitarium deep in the West Virginia wilderness is deserted after an inbred family of hillbilly cannibals escape and take revenge on their captors. Decades later, a group of college students seek refuge in the now abandoned hospital after a blizzard derails their plans for a weekend winter break. But when the students encounter the medical ward's most frightening former patients, their only choice is to fight back... or die trying! (official distributor synopsis)