"We now know that the campsite area was a mix of pine and cottonwood trees and that the particular tree that caused the fatality was a cottonwood tree with rot at its base," authorities added.

A 79-year-old skier spent the night in a tree well after becoming disoriented in Montana, officials said. Screengrab from Two Bear Air Rescue's video on Facebook A 79-year-old skier built a small ...