A tragic outcome for the group of backcountry skiers after an avalanche in the Castle Peak area of the Sierra Nevada mountain range.

A skier and her dog accidentally triggered a small avalanche in Andorra, and her helmet-cam video went viral. Watch here.

A human-triggered avalanche swept away snowboarders in Rocky Mountain National Park, but, thankfully, everyone survived. Watch here.

Several people on snowmobiles were in the path of a recent avalanche in the Colorado backcountry. Watch it here.

An ice climber survived an avalanche as he was solo climbing The Ribbon in Colorado. Watch the terrifying footage here.

Mountaineers were doing some ice climbing while waiting for their K2 summit push, when all of the sudden, an avalanche starts. Watch it here.