in 2006, the marine corps marathon introduced the mcm10k, a run starting at the national mall in washington, dc. the mcm10k and mcm begin simultaneously with mcm10k runners joining the final leg of the marathon course, sharing in the iconic finish up the hill to the marine corps war memorial. since its inception, the mcm10k has steadily increased in popularity. in 2012, the event sold out with 10,000 registered runners.