After making a nationality transfer, De Reuck made her first appearance for "Team USA" at the 2002 World Cross Country Championships in Dublin, Ireland, where she finished third overall (27:17) and helped the United States team to a silver medal. The following year she finished in seventh place at the 2003 World Cross Country Championships, helping the U.S. team to the bronze medal. She made her fourth and final Olympics the 2004 Athens Olympics. She finished in 39th place in the marathon, while U.S. teammate Deena Kastor won the bronze medal.
