Yvonne van Vlerken Athlete
Yvonne van Vlerken (born 5 November 1978) is a Dutch triathlete and duathlete, twice winner of Quelle Challenge Roth, who in 2008 set a then world record for Ironman-distance triathlon races. She is one of a small group of female triathletes to have recorded three or more sub-9 hour times over the Ironman distance.
