They estimate the crowd on Mass at 100,000 and I believe it. It stretched from 7th clear down to south park. Here's a shot from about 8th looking south.
Here's some pics from the parade.
After the parade there was a final celebration and award ceremony at the Fieldhouse. Here's the '88 trophy and rings.
Here's a closeup of the '88 rings.
And here's a closeup of Simien's championship ring with the Heat... bling, bling!