Risks of Using Tree Well Shelters During Avalanches?

Tree Well Entrapment Risks

Tree well shelters are often located in a funnel-shaped depression near the base of a tree, which can make them difficult to access if the person inside is buried or the tree is partially buried by an avalanche. Research has shown that tree well entrances can be up to 7 feet (2.1 meters) deep, making it challenging to escape if the entrance is blocked.

Limited Visibility and Escape Routes

Tree well shelters often have limited visibility due to the surrounding trees and the funnel-shaped design. This limited visibility can make it difficult for the person inside to see an approaching avalanche or escape route. In addition, tree well shelters usually have only one or two escape routes, which can be easily blocked by an avalanche.

Avalanche Forces and Burial Risks

Avalanches can exert forces of up to 10 tons per square inch (psi), which can easily crush or bury a person in a tree well shelter. The force of an avalanche can also cause the tree itself to be uprooted or partially buried, trapping the person inside the shelter. These forces can be fatal, even if the person inside the shelter is wearing an avalanche airbag or other safety gear.