NEW : Friend : Anthony `` Tony '' Seibert was `` an uplifting person '' who loved the backcountry . NEW : East Vail Chutes 's COO laments `` an incomprehensible loss '' to the community , the Seiberts . Peter Seibert Sr. dies in Vail ; three people were rescued with minor injuries . ( CNN ) -- The lone victim is a grandson of Seibert , a co-founder of the Vail ski resort .
NEW : Friend : Anthony `` Tony '' Seibert was `` an uplifting person '' who loved the backcountry . NEW : East Vail Chutes 's COO laments `` an incomprehensible loss '' to the community , the Seiberts . Peter Seibert Sr. dies in Vail ; three people were rescued with minor injuries . The lone victim is a grandson of Seibert , a co-founder of the Vail ski resort .