By skyforbes 
The march will start at Father Duffy Square at 47th Street and Broadway (right behind the TKTS stairs). The march will go down via 7th Avenue and will disperse at 14th Street (not by Union Square) According to the website the full march, from start to end, will be an hour's march with access to the subway on both ends.
The website above also has a FAQ with more information and some frequently asked questions. According to the website it is advised that people arrive early (at least 30 minutes early) and especially if you are a group.
While this march will be rain or shine, the weather is expected to be 58*F at march kickoff and sunny with light wind.
THIS IS A MARCHING EVENT – THERE WILL BE NO PRE-MARCH OR POST-MARCH RALLY.