At the opening ceremonies of the 1976 Winter Olympics, Feistmantl and fellow Austrian alpine skier Christl Haas were lighters of separate Olympic Flames as defined by Innsbruck"s hosting of their second Winter Olympics. Feistmantl was inducted into the International Luge Federation Hall of Fame in 2005 along with Hans Rinn.
Competing in two Winter Olympics, he won the gold medal in the men"s doubles event at the 1964 Winter Olympics in Innsbruck. Feistmantl also won five medals in the men"s singles event at the FIL World Luge Championships with one gold (1969), two silvers (1959, 1970), and two bronzes (1967, 1971). He also won three medals in the men"s doubles event at the FIL European Luge Championships with one gold (1967) and two silvers (1954, 1962).
