Finnish runner, who won two successive gold medals in the Olympic Games (1932, 1936) for the 3,000-metre steeplechase.

Iso-Hollo also won a silver medal for the 10,000-metre race at the 1932 Olympic Games in Los Angeles and a bronze medal in the same event during the 1936 Games in Berlin. During the 1932 Olympic steeplechase, an official's error forced the competitors to run an extra lap.