Lewy Boulet finished second at the 2008 U.S. Olympic Team Trials - Women's Marathon, held on April 20, 2008, in Boston, Massachusetts, in a then personal-best time of 2:30:19. She led the race for the first 24 miles before being overtaken by eventual winner Deena Kastor. During the women's marathon at the 2008 Summer Olympics, a lingering knee injury forced Lewy Boulet to drop out 20 kilometres into the race.