Nice summary on recognizing and assessing avalanche terrain.
Good to remember that skiable trees don't add to safety, "Some people think trees and rocks can help anchor the snow. Intuitively it makes some sense that trees and large boulders would anchor the snow, but in practice they often don’t. The only thing that decides if an avalanche will travel is the slope’s steepness. And the structure of the snowpack will decide if the snow fractures...very tight trees can be anchors. There is an old adage that forested, steep slopes are only safe if the trees are too close to ski (make turns) through."