Continuity mistake: This is actually in a deleted scene on the DVD: Jones shoots a mountain lion at night, and it's seen to be completely dark out. The two other men go out to look at it, but when they're walking across the snow, the sky is suddenly pale blue and there's light just below the horizon. It looks like it's just before dawn or just after sunset. But when they reach the dead mountain lion, the sky is suddenly black again, and it looks like it's the middle of the night.
Continuity mistake: When Boss and Charlie are crossing the flooded main street (before rescuing the dog), Boss is holding his shotgun pointing up into the rain in one shot, then in the next shot (from a different angle), it's pointing down, then up again and so on.
Continuity mistake: As the girls ride in to town to avenge Kim, there is a deputy in a faded red shirt on a second-floor balcony. The first time he gets shot, he does a flip onto the street. The second time he gets shot, he goes over backwards.