Wrong Turn 3: Left for Dead (2009)

After a prison transfer bus crashes deep in the West Virginia forest, a group of convicts and a corrections officer are left stranded in hostile backwoods. Their fight to survive takes a darker turn when they encounter a terrified rafter fleeing the cannibalistic hillbillies who killed her friends. Trapped far from help, the survivors must face vicious, horribly disfigured attackers hunting them through the woods.