Wolf's Hole (1987)

Ten troubled teens from different schools are chosen for a skiing workshop in the mountains. On the day of, eleven young people arrive, each bearing an invitation. A massive avalanche hits, and the lodge is cut off from outside contact. Unfortunately, as food supplies are limited, the three instructors strongly advise that the youths work together to make do or choose someone to leave. The kids soon learn that their 'teachers' are not what they seem to be.