The Burrowers
Movie, 2008
Rotten tomatoes reviews
This is a relatively obscure and odd horror flick. It's a period piece as well, a western. I quite enjoyed it though obviously a lot of people did not. It's one of those odd balls where the critics liked it and the audience mostly panned it.
Boils down to a monster movie. Mostly.
It's a bit slow and goes in more for the creepy factor than the gore.
The monsters are really the main star but it also boasts one of my favorites--
Clancy Brown, AKA
The Kurgan
and the mean guard from Shawshank redemption
and Mister Crabs