Born on 3 June 1946 in Hasselt, Belgium, Fontaine grew up with her parents near the Zolder race track and thus came into contact with motorsport at an early age.
In 1966, she began touring car racing and drove an Alfa Romeo Giulia Ti Super 1600 in the Belgian championship.
[citation needed] Her greatest international success was second place in the 1975 24 Hours of Spa.
[4] Fontaine also competed in the 24 Hours of Le Mans twice, with the all-female teams being successful both times.
In 2016 she published her autobiography, Ma passion, covering her twelve years as a racing driver.