Analysing terrain data
The exposure grade does not take into account objective hazards (stone fall, seracs, etc) but only the consequences of the skier falling.
Low Exposure (E1): Exposure is limited to that of the slope itself. Getting hurt is still likely if the slope is steep and/or the snow is hard.
Medium Exposure (E2): As well as the slope itself, there are some obstacles (such as rock outcrops) which could aggravate injury.
High Exposure (E3): In case of a fall, death is highly likely.
Extreme Exposure (E4): In case of a fall, the skier faces certain death.
Less steep than some of the Brevent couloirs but not to be underestimated.
Although shorter than the other Brevent couloirs the Allias offers a wider canvas perfect for opening up.
After following the "Charles-Bozon" piste hang a right before "Altitude 2000" into the wide couloir leading you into the Brevent bowl and then the track down to Chamonix- make sure there is enough snow to get you down or it's a long walk!