It's Marathon Day
This is a rough map of the route of the New York City Marathon through Brooklyn from the Daily News. There are no detailed maps that we could find, so we'll simply reiterate that it runs down Fourth Avenue then head down Laffayette and ends up on Bedford Avenue. It eventually makes its way across the Pulaski Bridge. Fourth Avenue is close from 8:15AM to 1PM. The lead pack of professional runners should come through Fourth Avenue in the Slope around 10:30AM and be in Williamsburg by 11AM. You can find out everything you need to know at the official marathon website.