How many bridges do you cross in the New York Marathon?

The New York Marathon crosses five bridges: the Verrazzano at km 1, the Pulaski at the halfway point into Queens, the Queensboro at km 25 into Manhattan, then the Willis Avenue into the Bronx, and the Madison Avenue to come back. These bridges account for most of the elevation gain of the New York Marathon, with the Verrazzano as the first real test.