Mgbe a na-eme egwuregwu n'oge okpomọkụ n'afọ 2008 na Beijing, China, Steffen meriri n'ọsọ ọsọ 100 mita, bụ́ nke a na-agba n'ebe a na-agba ọsọ n'ebe a na-agba ọsọ n'ebe a na-agba ọsọ n'ebe a na-agba ọsọ n'ebe a na-agba ọsọ, o jidere Libby Trickett, onye Australia, bụ́ onye kasị gbaa ọsọ n'ụwa n'ọsọ ahụ. Steffen metụrụ aka na 53.12 sekọnd, na-emezi ihe ndekọ Olympic nke 53.38 setịpụrụ na ụkwụ nke 4 × 100 m freestyle relay. Steffen mechara merie Dara Torres n'ọsọ mita iri ise e ji ụkwụ aga
ọlaedo na oge nke 24.06 sekọnd, na-emeri site 0.01 sekọnd.