This chapter from an Outdoor Emergency Care guide details the recognition and management of cold-related medical emergencies, primarily for ski patrollers and other outdoor responders. It explains conditions like frostnip, frostbite, and the different types and severities of hypothermia, including afterdrop and considerations for avalanche victims. The text outlines patient assessment techniques specific to cold injuries and describes various treatment methods, emphasizing the importance of preventing further heat loss and appropriate rewarming strategies, while also addressing considerations for resuscitation in severe cases. Resources and learning objectives are provided for both instructors and students using the guide.