Knotfest is a music festival created by American heavy metal band Slipknot . The inaugural Knotfest was a two-city event and took place on August 17 , 2012 in Council Bluffs , Iowa and August 18 , 2012 in Somerset , Wisconsin . Among the line-up were bands such as Deftones , Lamb of God , and Cannibal Corpse . On March 24 , 2014 , it was officially announced that " Knotfest Japan " would be held in November 15 and 16 at Makuhari Messe , Tokyo . Headliners were Slipknot . Korn , Limp Bizkit , Lamb of God , Five Finger Death Punch , Papa Roach , Bring Me the Horizon , Trivium and In Flames . On the first date of the Mayhem Festival 2014 , Knotfest 2014 was announced , with it being held at the San Manuel Amphitheater in San Bernardino , California , on October 24 – 26 . Knotfest 2015 was to be held at the same location , from October 23 through 25
Mayhem Festival 2014
Mayhem Festival 2014
Knotfest