PITTSBURGH — More than 300,000 black-and-gold bedecked Pittsburgh Steelers fan — about the population of the city itself — packed the streets of "Sixburgh" on Tuesday for a parade celebrating the storied franchise's unprecedented sixth Super Bowl title.

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. Rousing chants of "Here we go Steelers!" pulsed through the crowd as they 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.

Renaming the city Sixburgh for the day, Pittsburgh Mayor Luke Ravenstahl made his way through the parade alongside quarterback Ben Roethlisberger, both filming the crowd that painted a gray sky yellow with twirling Terrible Towels.

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 winter jacket.

Even police got into the spirit, waving Terrible Towels from atop horses as they led the parade.