This isn't a bad movie, per se — I actually think it's fantastic — but it's astonishing how few people have even heard of a Donner Party-inspired period horror film starring that guy from Memento, that guy from Trainspotting, that guy from Minority Report, that guy from LOST, the principal from Ferris Bueller's Day Off, and David Fucking Arquette.
It's on Amazon Instant Streaming (for $2.99) and appears to be available on Netflix.
http://www.youtube.com/watch?v=JO98NMMgp0Y