For the rest of her career, Lewis focused on the 800-metre freestyle, in which her best Olympic result was a silver medal at the 1992 Summer Olympics and a silver at the 1994 Rome World Championships. She also won a bronze medal in the 400-metre freestyle in Barcelona. At the 2001 World Aquatics Championships, Lewis won a bronze medal in the 5-kilometre open water competition. She had planned to attempt to qualify for the 10-kilometre open water event at the 2004 Summer Olympics, but this event was removed from the competition. She competed at three Olympics.