This year, spectators also will have limited access to the start and finish areas, and some parking areas near the lines will be closed, Gigas said.
He said bomb-sniffing dogs had been used at the race in previous years but more will be on hand this time. The dogs also will check buses that transport spectators. Plainclothes officers will also be present.
The May 5 marathon will start in Oceanport and end in Long Branch. Gigas said about 10,500 people had registered for the race. The event also includes a half-marathon that will see the same security measures. Gigas said there can be up to 8,000 spectators at the event.
He said some runners who could not finish the Boston Marathon because of the bombings plan to race in New Jersey.
Damage to boardwalks caused by Hurricane Sandy means the race will be run only on roadways this year. Gigas said the race's route needed to be certified in April, before any boardwalks were completely reconstructed.
Gigas, who lost his own home in Long Branch because of the storm, said that despite many towns along the route struggling to rebuild, everyone involved was determined to make sure the race goes forward.
"Every one of those towns came together on their own to help me put on this race," Gigas said. "It's good for the economy, good for our state pride, and good for tourism."