After any major rally, one of the biggest questions becomes how large it was. Here are some pictures to help estimate.
Pictures embedded below.
That is a lot of people. Exactly how large is difficult to tell from the angle. As I recall, Adam Savage of Mythbusters fame announced there were 150,000 people in the crowd, while Jon Stewart estimated 250,000 plus. The overhead shots come with an estimate of 215,000 +/-10% from AirPhotosLive.com (the ones who vastly underestimated Beck's Restoring Honor Rally).
First impressions of the pictures puts my estimate between 200,000 and 300,000; less then Beck's Restoring Honor Rally, but more than the One Nation Rally.
Past related posts:
Berman Post: Stewart And Colbert Announce Competing Rallies; Same Time, Same Place
Berman Post: Rally to Restore Sanity And/or Fear Announcement