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The Ohio festival includes Metallica, Slipknot, Deftones, Rancid, Anthrax, Testament, Suicidal Tendencies, Cypress Hill, Power Trip, Knocked Loose, Code Orange, Brutus, and more...

Cypress Hill, Anthrax, Flatbush Zombies, Suicidal Tendencies, Testament, The Darkness, Knocked Loose, Code Orange, Power Trip, Brutus, and more round out the lineup.

Aftershock has Tool, Korn, Slipknot, blink-182, Rob Zombie, Marilyn Manson, Lamb of God, and more; and Louder Than Life has Guns N' Roses, Slipknot, Rob Zombie, Marilyn Manson, GWAR, Melvins, and more...

The lineup also includes Rob Zombie, Bad Religion, Lamb of God, Andrew WK, The Interrupters, Knocked Loose, Fishbone, HEALTH, Spirit Adrift, Angel Du$t, and more.

The lineup also includes Rob Zombie, Melvins, Dropkick Murphys, Suicidal Tendencies, Andrew WK, Graveyard, Anti-Flag, Redd Kross, Die Antwoord, and more.

The hard rock and metal-centered fest will take place from April 20-21 at the Downtown Las Vegas Events Center.

It's a ridiculously stacked Thursday in (and around) NYC, with Arcade Fire, Tame Impala, Okkervil River, Slayer, Regina Spektor, Ben Gibbard, Giorgio Moroder, A$AP Ferg, and still more.

Sacramento's Aftershock is yet another date on Ozzy Osbourne's gradually-expanding festival tour (with Zakk Wylde).

Louder Than Life goes down the exact same two days as the Sonic Boom festival, which has a very similar lineup.

The metal/hard rock fest also includes Anthrax, Megadeth, Body Count, Lamb of God, Meshuggah, Rob Zombie, Behemoth, and more.