A woman who was killed in a crash on Sydney's north shore on Sunday has been remembered as a promising young doctor who was due to start at Royal North Shore Hospital in a few weeks.

Dr Ann Formaz-Preston, 33, was riding with a small group of friends on Mona Vale Road in Pymble just after 10am when a car collided with her bicycle on the intersection of Woodlands Avenue.

Despite the efforts of paramedics and bystanders, the Canadian expat died at the scene.

Her long-term partner Christopher Vanneste has remembered his "best friend" as a lover of fitness who had been accepted to train in Obstetrics and Gynaecology.