Scott Barbarossa, 50, and his son Zachary, 11, mistakenly went out of bounds on Pico Mountain, part of the Killington ski resort in Sherburne, Vt., on their last run of the day and became lost.
Barbarossa called 911 from his cellphone about 2 p.m., reporting the duo was lost. He called again twice more, hoping his phone’s internal GPS would help rescuers find them.
As the sun set in Vermont, the temperature dropped, and survival training kicked in. Father and son spent 45 minutes building a snow shelter at a spot off the trail where a large tree had fallen over a large rock. They packed snow around it to create an air pocket large enough for two people and covered it with their skis, branches from the fallen evergreen, and more snow.