"It is with great pleasure that the MCM can officially announce we are on. We are SO on," Nealis said in a statement to runners Thursday. "See you at the start line!"
The marathon is scheduled for Oct. 27.
The shutdown, which closed federal buildings, monuments and parks,threatened to affect the annual marathon, with organizers announcing earlier this week that "all options" were on the table — including canceling the event or a potential route change.
More than 60 percent of the marathon's course is on National Park Service land.
"The course hasn't changed," marathon spokeswoman Tami Faram told Patch on Thursday. "We're excited."