In 2006, Bentley placed third at the Ironman World Championship, her best showing and finished second at the Ironman 70.3 World Championships in Clearwater, Florida three weeks later.
Bentley's notable achievement was being ranked third at the Ironman World Championship in 2006, which was her most successful performance to date. She then secured a close second place finish at the Ironman 70.3 World Championships in Clearwater, Florida just three weeks later.