Festival dijadwalkan dari 18 Jun hingga 21 Jun 2015 (3 hari).
Hellfest berlangsung di Clisson, France. Berikut adalah alamat lengkap festival: Rue du Champ Louet 44190 Clisson, France
Slipknot, Scorpions, Judas Priest, Korn, Nightwish, Five Finger Death Punch, Motionless in White, Lamb of God, Alice Cooper, L7, A Day to Remember, Billy Idol, Godsmack, Arch Enemy, In Flames, ZZ Top, Epica, Hollywood Undead, Cradle of Filth, NOFX.
Genre dan sub-genre yang paling populer dari edisi sebelumnya adalah:
rock
heavy metal
punk
metal
death metal
hardcore
thrash metal
hard rock
black metal
metalcore
hardcore punk
alternative
doom metal
punk rock
stoner metal
alternative metal
thrash
alternative rock
groove metal