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.
The 100's are a route through what are often referred to as the Hourglass Cliffs.
The Hourglass Cliffs are a rock outcropping that is exposed to high winds.
The snowpack is often very thin.
The thin snowpack coupled with the many rock features means that there are often small avalanches in Hourglass Cliffs. The 100's is the furthest skiers right in Hourglass cliffs, and usually has the most consistent snow.