The lineup has been revealed for the 2021 Aftershock Festival. That event will be held on October 7-10 at Discovery Park in Sacramento, CA. Here's the daily lineups:

October 7: Limp Bizkit, Parkway Drive, Testament, Hatebreed, Exodus, Knocked Loose, and Fit For A King.

October 8: Metallica, Rancid, Volbeat, Seether, +LIVE+, Skillet, Suicidal Tendencies, Avatar, Pop Evil, Butcher Babies, Des Rocs, Ayron Jones, Crobot, Cleopatrick, Ego Kill Talent, Crown Lands, UnityTX, and Contracult Collective.

October 9: My Chemical Romance, The Offspring, Machine Gun Kelly, Gojira, Anthrax, Killswitch Engage, Asking Alexandria, Body Count, Badflower, Thursday, L7, Atreyu, Bones UK, South Of Eden, The Black Moods, Another Day Dawns, and American Teeth.

October 10: Metallica, Social Distortion, Rise Against, Mastodon, Pennywise, The Pretty Reckless, Black Veil Brides, Steel Panther, Yelawolf, Grandson, From Ashes To New, Alien Weaponry, Law, The Blue Stones, The Contortionist, Higher Power, Creeper, and The Cold Stares.