Karen Stives, a fiercely gifted horsewoman who helped lead the American equestrian team to an Olympic gold medal in the sport known as three-day eventing, barely missing out on an individual gold medal herself, died this month at her home in Dover, Mass. She was 64.
The cause was complications of a rare form of cancer, her partner, Robert Hutchison, said. She died late on Aug. 13 or early on Aug. 14, he said.
A prominent figure in American equestrianism, Ms. Stives represented the United States in international competitions, including the world championships, and was named rider of the year by the United States Combined Training Association (now known as the United States Eventing Association) three times in the 1980s.