Observer Name
Alta Avalanche Office
Observation Date
Wednesday, February 17, 2021
Avalanche Date
Wednesday, February 17, 2021
Region
Salt Lake » Little Cottonwood Canyon » Alta Ski Area » East Castle
Location Name or Route
East Castle (Closed Alta Terrain)
Elevation
10,600'
Aspect
Northeast
Trigger
Explosive
Trigger: additional info
Intentionally Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
8'
Width
800'
Vertical
1,250'
![](https://utahavalanchecenter.org/sites/default/files/styles/observation_image/public/images/avalanches/2020-21/751BA3DC-1D27-4AE4-A50B-A083C684EBD3.jpeg?itok=fDc70MOC)
![](https://utahavalanchecenter.org/sites/default/files/styles/observation_image/public/images/avalanches/2020-21/98966D17-B1D6-4E09-AAEA-A4C4FFC31F0C.jpeg?itok=s_Ck2CGs)
Video
Coordinates