Whether youre a seasoned marathoner, casual runner or training for your first 5K, we have a race for you. On Saturday, October 20 we kick off our weekend of races with our 5K, Meijer Kids Fun Run and Competitive 1-Mile. Then on Sunday, October 21 the Full Marathon, International Half-Marathon and Marathon Relay kick off our international events. The U.S.-Only Half-Marathon starts shortly after and rounds out our events. New in 2018, The Motor City Challenge Series allows participants to run more than one race during Detroits Marathon Weekend!