[2] Halliday raced in South Australian representative women's crews who contested the Victoria Cup at the Interstate Regatta.

[7] Halliday made her first Australian senior representative appearance at the 2000 World Rowing Cup III in Lucerne, Switzerland.

[7] At the 2006 World Rowing Championships in Eton, Dorney in the lightweight double-scull with Marguerite Houston, Halliday won the silver medal.

[8] She was named South Australia's Sports Star of 2007 and then pre-selected with Marguerite Houston for the 2008 Beijing Olympics in a double-scull.

[9] In late 2008 Halliday swapped her sculling shell for a bicycle, training with the South Australian Sports Institute squad.