Knotfest: Slipknot, Slayer, Amon Amarth, Anthrax & Trivium comes to San Manuel Amphitheater on Sunday 25th September 2016! This year fans are getting an extra epic show with a line-up that cannot be beaten, Knotfest and Ozzfest have joined forces to bring you all of it at once. Do you think you're ready for the full force?! Then book your tickets today and get ready to ROCK!

"Twenty years ago, we realized that there was no touring festival that supported music like these guys did. We came up with Ozzfest and for twenty years it was amazing. And for many of those years, we had the unbelievable SLIPKNOT playing. And SLIPKNOT came along and kicked our arses and created Knotfest. They took that around the world and it was hugely successful and critically acclaimed as one of the best festivals on Earth. Then we decided, 'Why not merge together?'"