[1] She contested state representative events (firstly for Queensland and later for South Australia) at nine successive Australian Rowing Championships.

[4] From 2001 Houston raced in Queensland representative lightweight women's crews who contested the Victoria Cup at the Interstate Regatta.

Houston made her first Australian representative appearance at the 2002 World Rowing Cup II in Lucerne, Switzerland.

[8] For the 2005 World Rowing Championships at Gifu, Japan Houston raced for Australia in the lightweight double scull with Kirsty Fleming.

[8] Still in the lightweight double-scull for the 2006 World Rowing Championships in Eton, Dorney but now paired with Halliday, Houston had greater success as they won the silver.

They stayed together in that same boat the following year for Munich 2007 where Houston and Halliday won the gold bringing Marguerite's second and Amber's third world championship title.