From infants to senior citizens, fans braved freezing temperatures and crowds so deep that for some, even seeing the parade was impossible.
Not that it mattered. Many just wanted to be part of the festive atmosphere and have the chance to revel in the team's 27-23 victory over the Arizona Cardinals in Sunday's Super Bowl XLIII. Rousing chants of "Here we go, Steelers!" pulsed through the crowd as fans waited for the team to make its way along the route.
"We're going to tell the school we had fever -- Steeler fever," 12-year-old Rachel Russell said, excusing her absence from school before leading a Steelers chant.
Fans filled parking garages, skyscraper windows, balconies and even climbed trees to get the best view of the team they love and possibly find shelter from the sporadic flurries and temperatures that hovered in the mid-20s.
"It's never too cold to watch the Steelers," said Annette Mowery, 47, who drove from the Pittsburgh suburb of Mars with her children, Lexie, 12 and Lucas, 10.
"We didn't have a good day, we had a great day. It's history," Lucas said, a Super Bowl XLIII hat perched atop a blue ski mask, a matching T-shirt squeezed over his jacket.
Tomlin couldn't stop smiling as he was greeted on stage at the end of the parade route with thunderous applause.
"What do you say to this?" Tomlin asked the massive crowd. "Steeler Nation, you leave us all speechless, man, we just appreciate the love. How about the Steelers? How about the greatest fans in the world? How about No. 6? Thank you. We love you guys."
Steelers owner Dan Rooney thanked the city for its support over the years -- and said there is more history to be made.
"Stay with us," Rooney said. "Maybe we'll get the seventh next year."
Steelers linebacker James Harrison, whose 100-yard interception return for a touchdown was the longest in Super Bowl history, presented the Lombardi Trophy to the crowd. About the same time, huge booms of colorful fireworks exploded over downtown's Point State Park, at the confluence of the iconic three rivers.
Police spokeswoman Diane Richard estimated that 300,000-plus people attended the parade -- more than the 250,000 fans who attended the 2006 parade celebrating the team's previous Super Bowl victory and close to the city's population of 311,000.
Thousands of fans showed up hours before Tuesday's parade, including a handful of hardy souls who were camped out on the route before dawn.
Six local high school bands marched in the parade, one for each championship won by the team.
"It was amazing to see the people. It was a once-in-a-lifetime experience, because I'm a senior," Nicole Hennemuth, a trombone player in the South Fayette High School band. "There were tons of people everywhere, on top of buildings, in windows."
Hennemuth was waiting behind the viewing stands at the end of the parade route, hoping to catch a glimpse of the players, particularly Ward.
"Me and Hines Ward have the same birthday," she said.
The parade followed Grant Street and Boulevard of the Allies, two of the widest streets downtown, instead of a narrower route used for most city parades. About 150 police were on hand to control the crowd, and barricades were set up in the streets because the sidewalks weren't wide enough to accommodate the overflow.
Down the street in front of the Art Institute of Pittsburgh, a dinosaur statue held a Super Bowl trophy in one hand and had red feathers protruding from its mouth, what was left from its "Cardinal snacks."
Phyllis Giardino, 61, took off from her job as a transcriptionist at St. Margaret's Hospital to be at the parade.
Vince Brown, 37, drove about four hours, in traffic, from his home in Clarksburg, W.Va., to attend the parade. With his 9-year-old daughter sitting on his shoulders, he was standing with his family about 75 yards from where the parade was to end. He couldn't see or hear much, but that didn't matter.
"If I didn't make it across the river, it would still be worth it," Brown said.
Copyright 2009 by The Associated Press