That's because the usual staging site is the federally operated Fort Wadsworth on Staten Island. Fort Wadsworth is part of Gateway National Recreation Area controlled by the National Parks Service.
Organizers of the Nov. 3 race say they are working with city, state and federal officials to come up with an alternate site if the shutdown continues.
They declined to say which site or sites they are considering but said it would remain on Staten Island. More than 45,000 runners will participate in this year's 26.2-mile run.
The marathon was canceled last year because of Superstorm Sandy. Additional security is planned for this year's event after twin bombing at the Boston Marathon killed three people and injured more than 260.