It's in the Blood (2012)

A year after a devastating tragedy shattered their family, a son and his distant father set out into the wilderness, hoping to mend old wounds. But when a brutal accident leaves Russell gravely wounded and the two stranded, October must fight to keep them alive. As their physical state declines, the untamed landscape begins to warp their perception, blurring the line between what is real and what is imagined. Survival becomes a descent into madness.