I used to live about four blocks from there and that space is a lot larger than it appears in the pics. That is one big crowd.
From the Denver Post:
"Do you ever have small crowds in Denver?" Obama asked the crowd, which shouted back "NO!"
Denver police estimated the crowd at more than 100,000.
The Obama campaign said it was the largest U.S. crowd to ever attend rally to see the Illinois senator.
The Capitol building in the background is four long blocks away.