Chris - casting
late teen/early twenties
Chris is the heart of the film, following behind John they must make it to the hospital in time. When things go awry in the cabin its up to Chris to take action. 
John - casting
late twenties
John is the guiding force for the film, and the one leading the two men's expedition. When they get lost in the storm John has no choice but to lead Chris to the ominous cabin. 
Marshall - casting
early fourties -  mid sixties
Marshall is a mystery to the two men. At first he seems like a kind and helpful figure, however beneath this façade lays something much darker.