Hayes died at the age of seventy-five from complications of an acute subdural hematoma which resulted from a fall near his residence in Malibu, California. He was survived by his three children and five grandchildren.<ref name=obit/>His son, Peter Gynt Hayes (1955-2015), was an [[educator]] and outdoorsman like his father. In 1988, he sustained a fall that crushed both heel bones but recovered. He spent his last years in [[Utah]] and taught for twenty-eight years.<ref name=pgh>{{cite web|url=https://www.legacy.com/obituaries/deseretnews/obituary.aspx?pid=175863971|title=Peter Hayes obituary|publisher=''Salt Lake City Deseret News''|date=September 20, 2015|accessdate=June 28, 2020}}</ref> | Hayes died at the age of seventy-five from complications of an acute subdural hematoma which resulted from a fall near his residence in Malibu, California. He was survived by his three children and five grandchildren.<ref name=obit/>His son, Peter Gynt Hayes (1955-2015), was an [[educator]] and outdoorsman like his father. In 1988, he sustained a fall that crushed both heel bones but recovered. He spent his last years in [[Utah]] and taught for twenty-eight years.<ref name=pgh>{{cite web|url=https://www.legacy.com/obituaries/deseretnews/obituary.aspx?pid=175863971|title=Peter Hayes obituary|publisher=''Salt Lake City Deseret News''|date=September 20, 2015|accessdate=June 28, 2020}}</ref> |