Festival dijadwalkan dari 19 Jun hingga 21 Jun 2009 (2 hari).
Hellfest berlangsung di Clisson, France. Berikut adalah alamat lengkap festival: Rue du Champ Louet 44190 Clisson, France
Bring Me the Horizon, Mötley Crüe, Dream Theater, Gojira, Volbeat, Amon Amarth, Papa Roach, August Burns Red, Parkway Drive, Machine Head, Manowar, Epica, Cradle of Filth, DragonForce, The Black Dahlia Murder.
Genre dan sub-genre yang paling populer dari edisi sebelumnya adalah:
heavy metal
rock
punk
metal
death metal
hardcore
thrash metal
hard rock
black metal
metalcore
progressive metal
grindcore
melodic death metal
stoner metal
stoner rock
sludge
technical death metal
brutal death metal
doom metal