FOX CHAPEL (KDKA) — Students at Fox Chapel Area High School are mourning the death of a fellow classmate who died in a skiing accident in western Colorado.

Senior Richard Cullinan was on vacation with his family at Beaver Creek Ski Resort. On Monday morning, the 18-year-old was on his first run of the day when something went tragically wrong.

He careened into a tree, suffering a massive head injury.

Cullinan was an avid skier. He was also a member of the school’s golf team.

Students describe him as popular, driven, and enthusiastic. Seniors are wearing simple white ribbons around their wrist to memorialize Cullinan.