Over $8,000 in prize money is up for grabs.
He wants his athletes to have fresh legs going into their races.
The 40-year-old once again showcased her mastery.
Leo Lightner started running in his 50s and now competes in marathons and ultramarathons.
She will race for Team USA in August.
They were honored by a crowd of thousands.
Deena Kastor placed fourth overall.
American leads the race from the start to claim victory.
Lelisa Desisa of Ethiopia presented his medal to Secretary of State John Kerry.
They are starting in Washington D.C. and ending on Boston's Boylston Street.