The Mountain of Hell 2012 dates have been announced for the weekend of 13-15th July 2012. We have hotel accommodation in Les Deux Alpes itself for the event. More info can be found here. Based on these dates and other events going on in the area (such as La Marmotte Sportive and the Alpe d’Huez Triathlon) it suggests that the Megavalanche will take place on the weekend of the 21st and 22nd July 2012. This is at time of writing yet to be confirmed.