The very notion of Fire in the Mountains feels like a dream: a weekend of heavy music (metal and otherwise) set against the backdrop of the Rocky Mountains. Held from July 23-26 on the Blackfeet Reservation and boasting a lineup including Neurosis, 16 Horsepower, and Enslaved, the intent behind Fire in the Mountains is something deeper and more noble than inviting a flock of metalheads to the pristine Montana wilderness. The people behind Fire in the Mountains have teamed with the Firekeeper Alliance, a nonprofit organization dedicated to suicide prevention and mental wellness for the Blackfeet Nation community, making the festival’s raison d’être feel more noble than your standard summer shindig.  “Dark and heavy music pairs naturally with the Firekeeper Alliance’s mission because it does not avoid pain, it engages it directly,” said Charlie Speicher, the non-profit’s director and founder.…