Avalanche: Chugach State Park

Location: Ptarmigan Peak, 61.05733N, 149.60190W

Route & General Observations

Approached via Rabbit Creek, ascended Ptarmigan southwest slopes. Little to no snow on slopes at elevations below 4300′, with exception of drifted snow in drainages. Avalanches observed in gullies opposite side of valley with northern exposure.

Avalanche Details
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Trigger Foot PenetrationRemote Trigger0
Avalanche Type Soft SlabAspect South Southwest
Elevation 4600ftSlope Angleunknown
Crown Depth 18inWidth 20ft
Vertical Run 150ft  
Avalanche Details

Climber-triggered slab avalanche. 10" to 18" crown. First climber crossed safely, second triggered avalanche after a few steps.

Red Flags
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Observer Comments


Weather & Snow Characteristics
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Clear, light wind, -5F in shade, 18F in sun

Snow surface

Newer snow, slightly settled. Same snow was plastered to rocks up high.


Powdery, wind-deposited snow on top of very solid wind-deposited snow with facet layer in between. Facet layer approximately 1cm. Well-bonded to ground, ~6' snow depth. Both layers increasingly solid towards the ground.

Photos & Video
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