The 4th annual Rockstar Energy Drink Mayhem Festival went down in July at the Whiteriver Amphitheater in Auburn, Washington. The annual metal bash brought out the hardcore rockers of all ages, as well as casual fans eager to watch the action from afar. This year’s headliners included Disturbed, Godsmack, Megadeth, and Machinehead. Daytime openers on two separate outdoor stages consisted of Suicide Silence, Trivium, Unearth, Kingdom of Sorrow, and a host of others. Published media coverage is up on Culture Mob, with the full photo gallery on Flickr.