SAN FRANCISCO (AP) - A 63-year-old triathlete died over the weekend while swimming the treacherous waters between Alcatraz Island and San Francisco.

Phillip Coulston was nearly to shore on the 1½-mile swim when his heart stopped Sunday. The dentist and longtime swimmer was a participant in the Escape from the Rock triathlon alongside his son-in-law, who tried to revive him.

Coulston had been on track to break the record for his age group when his heart stopped.

His daughter says he had no history of heart problems and that he had died doing something he truly enjoyed.