Observation: Hatcher Pass

Location: East Ridge 4068

Route & General Observations

Plan was to get out an access the snow pack and keep the angles low for the day. Skinned from Skeetawk up to 4068 via the low angle east ridge. Skinning up on our first lap we triggered a LARGE collapse at 3800 ft on the east ridge off of 4068. Cracks were visible in the snow +200 ft away from where we triggered the collapse.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?Yes
Cracking (Shooting cracks)?No
Observer Comments

Had several collapses around 3500 ft on the east ridge of 4068. Another LARGE collapse at 3800 ft. Cracks in the snow were visible +200 ft away from where we triggered the collapse. It was clear that if the slope had been any steeper we would have triggered a large avalanche. Snow pack at the collapse was approximately 60 cm deep on the ridge where the wind scoured ridge was transitioning to wind deposited snow.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Clear skies, cold, no wind.

Snow surface

Variable. Generally new snow on heavily wind rippled snow and sastrugi 1 cm to 80 cm deep.


Dug a hand pit at the collapse estimated snow profile from the top down: Top 10 cm fresh fist hard snow, 25 cm of 1 finger wind board, 10 cm of fist hard facets (culprit layer), 1 cm crust. 15 cm of 1 finger bonded facets.

Photos & Video
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