To get intimate shots of the most evil bands in the land, SPIN snuck past a gauntlet of hellhounds and pitchfork-wielding demons to meet them backstage (OK, we got a laminate).

1.Ne Bus Ultra

1/22

On Saturday, the 26-date Rockstar Energy Drink Mayhem Festival played its opening show in San Bernadino, California, kicking off its long, sweaty summer with Slipknot, Slayer, Anthrax, Motörhead, and much more. To get intimate shots of the most evil bands in the land, SPIN snuck past a gauntlet of hellhounds and pitchfork-wielding demons to meet them backstage (OK, we got a laminate). We also grabbed some shots of the most stylish metalheads in attendance.

Above: Aaron Matts, singer for Parisian deathcore crew Betraying the Martyrs, rides his steel horse. Their generator didn't work, so it was as hotter 'n hell.

2.Ne Bus Ultra

2/22

On Saturday, the 26-date Rockstar Energy Drink Mayhem Festival played its opening show in San Bernadino, California, kicking off its long, sweaty summer with Slipknot, Slayer, Anthrax, Motörhead, and much more. To get intimate shots of the most evil bands in the land, SPIN snuck past a gauntlet of hellhounds and pitchfork-wielding demons to meet them backstage (OK, we got a laminate). We also grabbed some shots of the most stylish metalheads in attendance.

Above: Aaron Matts, singer for Parisian deathcore crew Betraying the Martyrs, rides his steel horse. Their generator didn't work, so it was as hotter 'n hell.

3.Scary Monsters and White Pipes

3/22

Matts slaps five with Martyrs drummer Mark Mironov.

4.Tat Power

4/22

Danny Leal, vocalist for Upon a Burning Body, shows off his ink.

5.Vanthrax

5/22

Scott Ian of Anthrax catches a van ride to their show.

6.Vanthrax 2

6/22

Anthrax lead singer Joey Belladonna caught somewhere besides a mosh.

7.Mayhamstrings

7/22

Belladonna stretches before the show.

8.The Threat Is Real

8/22

Anthrax has come for you all.

9.Tsiltesnikufesin

9/22

Anthrax's set list.

10.Been Caught Smiling

10/22

Anthrax's Rob Caggiano grins.

11.State of Euphoria

11/22

Anthrax fans are fist-banging maniacs.

12.God Loves Us All

12/22

The Devil Wears Prada get in a pre-show prayer.

13.Nice Rack

13/22

Slayer's guitars.

14.Lemmy at 'Em

14/22

Lemmy Motörhead shows these kids how it's done. The master was correcting minute sound problems in between songs since he is a seasoned pro.

15.Def American

15/22

Slayer fans fly the flag.

16.You Slay Me

16/22

Slayer's Tom Araya shares a joke.

17.King Tuff

17/22

Slayer's Kerry King looking as unfuckwithable as ever.

18.Until the Vistalite Takes Us

18/22

Slayer's Dave Lombardo goes ham at Mayhem.

19.Unmasked!

19/22

Slipknot DJ Sid Wilson without his mask. Please do not murder us for running this photo, Slipknot.

20.Knot Landing

20/22

Corey Taylor of Slipknot.

21.Monster Maggots

21/22

Slipknot fans are some of heavy music's most loyal.

22.I Get Wet

22/22

Slipknot guitarist Mick Thomson gets hydrated.