Observer Name
Chase Morrell, UAC staff
Observation Date
Saturday, February 22, 2025
Avalanche Date
Sunday, February 23, 2025
Region
Logan » Franklin Basin » Boss Canyon » Coliseum
Location Name or Route
Coliseum, Boss Cny Fx
Elevation
9,100'
Aspect
East
Slope Angle
40°
Trigger
Snowmobiler
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
4'
Width
500'
Vertical
700'
Caught
1
Carried
1
Buried - Partly
1
Injured
1
Accident and Rescue Summary
Hi! There was a group of riders sitting at the bottom eating lunch and another snowmobiler not part of their group climbed the hill, and right as he crested the top, it broke right below him.
Guys at the bottom saw it coming and one guy couldn’t get out of the way in time and got partially buried and knocked out his front teeth. Buried his sled
Comments
Preliminary Report: A close call, especially considering that there was a group of riders at the bottom of the hill when the avalanche occurred. A single rider was cresting the slope and triggered the avalanche in an area where the slab (and the snow depth) was shallow. Most of the riders in the flats were able to get out of the way, but one rider wasn't. He was caught, partially buried, and injured. There were lots of people around who helped rescue the rider and dig out the deeply buried sled.
Video
Coordinates