Katherine Switzer has inspired generations of women to put on running shoes and take on one of the great challenges to human endurance - the marathon.
Switzer made headlines when she became the first woman to run in the famed Boston marathon, back in 1967.
It is a moment that has been marked in a new documentary, 'Spirit of the Marathon'.
Today she divides her times between here and the United States, and is still putting in the miles.