Update at 4:35 p.m. — 11,676 people have signed up for the marathon so far.
Registration for the 35th annual Marine Corps Marathon opened at noon today. More than 8,550 runners registered for the race during the first hour alone. There are 30,000 slots open.
The marathon is taking place this year on October 31 (which is also Halloween, for those who may want to run the 26.2 mile course in a costume).
Click here to go straight to the registration form.