Dawes competed in the 2008 Summer Paralympics in Beijing, and was one of several competitors caught up in a crash during the final of the women's 5000 m T54 wheelchair event, eventually finishing sixth despite a broken front wheel. The race was re-run, and Dawes spoke out against the treatment of Canadian athlete Diane Roy, who had been awarded the gold medal in the event, only to have it taken back and replaced with a silver medal when she finished second in the re-run. Dawes won a silver medal at the Women's 4x100 m T53/54 event at the Beijing games.