She participated at the 1991, 1995, 1999 and 2003 Pan American Games and won eight Pan American Games medals. A participant at the 1990, 1994 and 2002 Commonwealth Games, Hughes won gold in the time trial (road, 2002), bronze in the points race on the velodrome (2002), and silver in the 50 km team time trial (1994, with Alison Sydor, Anne Samplonius, and Lesley Tomlinson).