Avalanche: Chugach State Park

Location: N side of Eagle River Valley

Route & General Observations

Appears that a boarder triggered a wind slab between 3/4 and 3/6 on the ridge above the Mile High Saddle trail. Debris stopped about 50′ short of the trail, about 400′ vertical feet below the crown (this path was similarly triggered in 2021, sending debris across the trail). Lots of wind effect in the area from recent E, N, NW winds. Numerous sun-triggered wet loose releases in the area from E to S-facing rocks on 3/6.

Avalanche Details
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Trigger SnowboarderRemote Trigger No
Avalanche Type UnknownAspect South Southwest
Elevation 2500ftSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Run 400ft  
Avalanche Details

Sometime between the afternoon of 3/4 and morning of 3/6, a wind slab avalanche was triggered on the shoulder of the ridge that runs E from Mile High Saddle. A snowboard track goes into the crown on the S/SW-facing slope and out the side of the path a short ways below. Viewing the slide from some distance, estimate max crown depth around a foot, width about 30'. A stiff NW wind blew through here on 3/3, additional winds with N component likely since.

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)?No
Cracking (Shooting cracks)?No
Observer Comments

Recent strong wind and snow surface indicative of wind loading on the leeward slope where the slab was triggered. For afternoon of 3/6, numerous point releases from rocky areas with strong solar warming.

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

Bluebird, calm, upper 20s to low 30s F.

Snow surface

Highly variable surface of wind- and melt/freeze-affected snow.