Largest parade of floats

According to Official Guinness Records,

The largest parade of floats consisted of 343 floats at the "Corso do Zé Pereira" in Teresina, Brazil, on 11 February 2012.
Held since 1940, the annual parade is a "pre-Carnaval" party offered free of charge by the city of Teresina. The 2012 edition featured an estimated 40,000 in attendance to take part in and witness the record-breaking parade, which lasted for more than 6.5 hours. The parade route ran for 7.3 km (4.54 mi) with float themes including disco, Disney World, and John Lennon.

For a complete list of 2012 records, please visit 2012 Guinness Records in Brazil.

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