Check these next gatherings off on your list of must-see metal festivals this year. System of a Down, Slipknot, Marilyn Manson, Lamb of God and more awesome bands will be bringing the noise to the Heavy T.O. festival in Toronto and the Heavy MTL fest in Montreal.

Both the Heavy T.O. (Toronto) festival and the Heavy MTL (Montreal) festival will be held on the same two days, Aug. 11 and 12. Although the festivals will be held simultaneously, System of a Down, Slipknot, Marilyn Manson, Lamb of God and the rest of the ‘Heavy’ lineup will be performing at both locations, with the Toronto Saturday lineup serving as the Montreal Sunday lineup and vice versa.

The absolutely killer lineup for both ‘Heavy’ festivals also includes Killswitch Engage, Cannibal Corpse, Suicidal Tendencies, Five Finger Death Punch, Kataklysm, Gojira, Protest the Hero, Overkill, High on Fire, Veil of Maya, Job for a Cowboy, Goatwhore, The Faceless, Periphery, Exhumed and Between the Buried and Me.

Phew, that’s one hell of a bill. Raise your Canadian flags high and book yourself a trip to either Toronto or Montreal, because these events not to be missed.