Psycho Holocaust(2009)

On a scorching summer day 6 friends venture into the mountains for one more vacation before their lives change forever. Unbeknownst to them, their lives would forever be changed anyway. In the shadows awaits a pack of the most evil, the most vile, rejects of humanity that's addicted to violence and thirsty for blood! This is Psycho Holocaust... Written by Rufty, Krist