The MCM10K presented by Aetna has filled all 10,000 available entries for the sixth year in a row. The MCM10K is held annually in conjunction with the Marine Corps Marathon and spans 6.2 miles through the heart of the District. The race, scheduled for Sunday, Oct. 27, begins on the National Mall, follows the Potomac River and concludes at the Marine Corps War Memorial.
MCM10K participants represent 23 countries, 49 states and the District of Columbia. Additionally, more than 1,500 runners are military members from every branch of the Armed Forces.