Held at Downsview Park, Heavy T.O. is an offshoot of Heavy MTL, the metal fest that’s been happening in Montreal for a few years now.
Megadeth headlined day 1, with other sets delivered by Motorhead, Opeth, Childron Of Bodom, Diamond Head and others; since the two festivals were running on the same weekend, many of these bands were headed to Montreal to play Sunday’s show following their Toronto appearance.

Anthrax - Indians
Heavy T.O. – Downsview Park - Toronto, ON – July 23, 2011
See also:
VIDEO: Megadeth rock Heavy T.O. festival
VIDEO: Metallica, Big 4 rock Sonisphere UK
VIDEO: Metallica – Big 4 jam at Sonisphere UK
VIDEO: Metallica - pro-shot footage of Big 4 jam in Germany
VIDEO: Big 4 jam at Milan show
VIDEO: Big 4 - Watch full Metallica set from Sweden
VIDEO: Big 4 - Metallica, Megadeth and Anthrax jam at Sweden show